Hey guys,

Just curious if a 1998 GMC Jimmy came with DRL's? The one I bought doesn't have them, but has a relay marked "DRL" under hood, and all the vehicle literature says they do.

If the vehicle did come with them, what would cause them not to work? The auto headlights work(which means the light sensor works) , the brights (which would be the DRL's on low power) all work, and the relay is not bad (I replaced it).

I know some people don't like this option, but I'm one of the few that do. I drive all day with my lights on at work....

Any input would be appreciated.

Tom :D

fuse?

I think, they only come on when taken out of park, with the parking brake off. Any way see if this helps


Daytime Running Lamps (DRL) Headlamps Inoperative (Standard)

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Step







</TH><TH vAlign=bottom align=middle>Action







</TH><TH vAlign=bottom align=middle>Value(s)







</TH><TH vAlign=bottom align=middle>Yes







</TH><TH vAlign=bottom align=middle>No







</TH></TR><TR><TD vAlign=center align=middle>1







</TD><TD vAlign=top align=left>Did you perform the DRL System Check?







</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 2 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S02)







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD></TR><TR><TD vAlign=center align=middle>2







</TD><TD vAlign=top align=left>Use the scan tool in order to read the Body Control Module (BCM) current trouble codes.




Is DTC B2575, B2577, or B2600 set as a current code?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Diagnostic System Check - Body Control System (http://service.gm.com/servlets/CellHandler?CellId=8875&RefDoc=383612&evc=sm) in Body Control System







</TD><TD vAlign=bottom align=middle>Go to Step 3 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S03)







</TD></TR><TR><TD vAlign=center align=middle>3







</TD><TD vAlign=top align=left>

<LI type=1>Place the headlamp switch in HDLP position.
Connect a test lamp between the following components: <TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>UBEC terminal B1, connector C4 to ground </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>UBEC terminal B2, connector C4 to ground </TD></TR></TBODY></TABLE>
Does the test lamp light at both locations?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 13 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S13)







</TD><TD vAlign=bottom align=middle>Go to Step 4 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S04)







</TD></TR><TR><TD vAlign=center align=middle>4







</TD><TD vAlign=top align=left>Connect a test lamp from CKT 1940 (ORN) at the headlamp switch to ground.




Does the test lamp light?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 6 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S06)







</TD><TD vAlign=bottom align=middle>Go to Step 5 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S05)







</TD></TR><TR><TD vAlign=center align=middle>5







</TD><TD vAlign=top align=left>Locate and repair the open in CKT 1940 (ORN) between the IP Fuse Block and the headlamp switch.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>6







</TD><TD vAlign=top align=left>Connect a test lamp between CKT 352 (WHT) at the headlamp switch to ground.




Does the test lamp light?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 8 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S08)







</TD><TD vAlign=bottom align=middle>Go to Step 7 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S07)







</TD></TR><TR><TD vAlign=center align=middle>7







</TD><TD vAlign=top align=left>Replace the headlamp switch.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>8







</TD><TD vAlign=top align=left>Connect a test lamp from pin 2 of the Headlamp Power Relay to ground.




Does the test lamp light?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S10)







</TD><TD vAlign=bottom align=middle>Go to Step 9 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S09)







</TD></TR><TR><TD vAlign=center align=middle>9







</TD><TD vAlign=top align=left>Locate and repair the open in CKT 352 (WHT) between the headlamp switch and the Headlamp Power Relay.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>10







</TD><TD vAlign=top align=left>

<LI type=1>Remove the Headlamp Power Relay.
Connect a test lamp from pin 2 to pin 1 of the Headlamp Power Relay socket.
Does the test lamp light?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 11 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S11)







</TD><TD vAlign=bottom align=middle>Go to Step 12 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S12)







</TD></TR><TR><TD vAlign=center align=middle>11







</TD><TD vAlign=top align=left>Replace the Headlamp Power Relay.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>12







</TD><TD vAlign=top align=left>Locate and repair the open in CKT 350 (BLK) between the Underhood Bussed Electrical Center (UBEC) and G102.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>13







</TD><TD vAlign=top align=left>

<LI type=1>Disconnect C211 at the steering column.
Connect a fused jumper between terminal E12 (YEL) and terminal E13 (YEL) in order to bypass the multifunction switch.
Do the headlamps light?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 14 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S14)







</TD><TD vAlign=bottom align=middle>Go to Step 17 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S17)







</TD></TR><TR><TD vAlign=center align=middle>14







</TD><TD vAlign=top align=left>Inspect the integrity of the terminals.




Are the terminals in need of repair?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Step 15 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S15)







</TD><TD vAlign=bottom align=middle>Go to Step 16 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S16)







</TD></TR><TR><TD vAlign=center align=middle>15







</TD><TD vAlign=top align=left>Repair the terminals as necessary.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>16







</TD><TD vAlign=top align=left>Replace the multifunction switch.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>17







</TD><TD vAlign=top align=left>

<LI type=1>Remove the Headlamp Ground Relay.
Connect an ohmmeter between the following components: <TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Pin 3 at the Headlamp Ground Relay </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Pin E13 at C211 </TD></TR></TBODY></TABLE>
Is the resistance greater than the specified value?




</TD><TD vAlign=center align=middle>1 ohms







</TD><TD vAlign=bottom align=middle>Go to Step 18 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S18)







</TD><TD vAlign=bottom align=middle>Go to Step 19 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S19)







</TD></TR><TR><TD vAlign=center align=middle>18







</TD><TD vAlign=top align=left>Locate and repair the open in CKT 10 (YEL).




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>19







</TD><TD vAlign=top align=left>

<LI type=1>Reinstall C211.
Connect an ohmmeter between relay terminal 3 and terminal 4 of the Headlamps Ground Relay.
Is the resistance greater than the specified value?




</TD><TD vAlign=center align=middle>1 ohms







</TD><TD vAlign=bottom align=middle>Go to Step 20 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S20)







</TD><TD vAlign=bottom align=middle>Go to Step 21 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=383612&evc=sm&pubid=67&cellId=52374&mspsdsubkey=472#S21)







</TD></TR><TR><TD vAlign=center align=middle>20







</TD><TD vAlign=top align=left>Locate and repair the open in CKT 350 (BLK).




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR><TR><TD vAlign=center align=middle>21







</TD><TD vAlign=top align=left>Replace the Headlamp Ground Relay.




Is the repair complete?




</TD><TD vAlign=center align=middle>--







</TD><TD vAlign=bottom align=middle>Go to Daytime Running Lights (DRL) System Check (http://service.gm.com/servlets/CellHandler?CellId=52440&RefDoc=383612&evc=sm)







</TD><TD vAlign=bottom align=middle>--







</TD></TR></TBODY></TABLE>
Daytime Running Lights (DRL) System Check (Standard)

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Step







</TH><TH vAlign=bottom align=middle>Action







</TH><TH vAlign=bottom align=middle>Normal Result(s)







</TH><TH vAlign=bottom align=middle>Abnormal Result(s)*







</TH></TR><TR><TD vAlign=center align=middle>1







</TD><TD vAlign=top align=left>

<LI type=1>Turn the ignition switch to the OFF position. Do not set the park brake. <LI type=1>For automatic transmission, place the transmission in PARK. For manual transmission, place the transmission in NEUTRAL. Block the wheels. <LI type=1>Place the headlamp switch in the AUTO position. <LI type=1>Ensure that a sufficient amount of light reaches the ambient light sensor. Use a trouble light if necessary.
Turn the ignition switch to the ON position. Do not start the engine.

</TD><TD vAlign=top align=left>


The DRLs are ON.
All of the other exterior lamps are OFF.

</TD><TD vAlign=top align=left>


Daytime Running Lamps (DRL) Inoperative, Headlamp Switch Operates Normally (http://service.gm.com/servlets/CellHandler?CellId=52438&RefDoc=497473&evc=sm)
Daytime Running Lamps (DRL) Headlamps Inoperative (http://service.gm.com/servlets/CellHandler?CellId=52374&RefDoc=497473&evc=sm)
Headlamps On in Daylight Conditions

</TD></TR><TR><TD vAlign=center align=middle>2







</TD><TD vAlign=top align=left>

<LI type=1>Turn the ignition switch to the OFF position. <LI type=1>Set the park brake. <LI type=1>For automatic transmission, place the transmission in PARK. For manual transmission, place the transmission in NEUTRAL. Block the wheels. <LI type=1>Place headlamp switch in the AUTO position.
Turn the ignition switch to the ON position. Do not start the engine.

</TD><TD vAlign=top align=left>


The DRLs are OFF.
All of the other exterior lamps are OFF.

</TD><TD vAlign=top align=left>Headlamps, DRL On With Park Brake Applied







</TD></TR><TR><TD vAlign=center align=middle>3







</TD><TD vAlign=top align=left>

<LI type=1>Cover the ambient light sensor in order to prevent any light from reaching the sensor. <LI type=1>For automatic transmission, place the transmission in DRIVE, then in PARK. For manual transmission, place the transmission in NEUTRAL. Block the wheels. Do not set the park brake. <LI type=1>Place headlamp switch in the AUTO position.
Turn the ignition switch to the OFF position. Do not start the engine.

</TD><TD vAlign=top align=left>


The DRLs are OFF.
The headlamps are ON.
All of the other exterior lamps are ON.

</TD><TD vAlign=top align=left>


Headlamps Inoperative - High Beams (http://service.gm.com/servlets/CellHandler?CellId=52689&RefDoc=497473&evc=sm)
Headlamps Inoperative in Low Light Conditions (http://service.gm.com/servlets/CellHandler?CellId=52692&RefDoc=497473&evc=sm)
Headlamps Inoperative - Left High Beam (http://service.gm.com/servlets/CellHandler?CellId=52378&RefDoc=497473&evc=sm)
Headlamps Inoperative - Left Low Beam (http://service.gm.com/servlets/CellHandler?CellId=52376&RefDoc=497473&evc=sm)
Daytime Running Lamps (DRL) Headlamps Always On (http://service.gm.com/servlets/CellHandler?CellId=52373&RefDoc=497473&evc=sm)
Headlamps Inoperative - Right High Beam (http://service.gm.com/servlets/CellHandler?CellId=52377&RefDoc=497473&evc=sm)
Headlamps Inoperative - Low Beams (http://service.gm.com/servlets/CellHandler?CellId=52687&RefDoc=497473&evc=sm)
Headlamps Inoperative - Right Low Beam (http://service.gm.com/servlets/CellHandler?CellId=52375&RefDoc=497473&evc=sm)
Exterior Lights System Check (http://service.gm.com/servlets/CellHandler?CellId=52462&RefDoc=497473&evc=sm)

</TD></TR><TR><TD vAlign=center align=middle>4







</TD><TD vAlign=top align=left>Place the headlamp switch in the HEAD position.







</TD><TD vAlign=top align=left>


The DRLs are OFF.
The headlamps are ON.
All of the other exterior lamps are ON.

</TD><TD vAlign=top align=left>


Exterior Lights System Check (http://service.gm.com/servlets/CellHandler?CellId=52462&RefDoc=497473&evc=sm)
Headlamps Inoperative - High Beams (http://service.gm.com/servlets/CellHandler?CellId=52689&RefDoc=497473&evc=sm)
Headlamps Inoperative in Low Light Conditions (http://service.gm.com/servlets/CellHandler?CellId=52692&RefDoc=497473&evc=sm)
Headlamps Inoperative - Left High Beam (http://service.gm.com/servlets/CellHandler?CellId=52378&RefDoc=497473&evc=sm)
Headlamps Inoperative - Left Low Beam (http://service.gm.com/servlets/CellHandler?CellId=52376&RefDoc=497473&evc=sm)
Headlamps Inoperative - Right High Beam (http://service.gm.com/servlets/CellHandler?CellId=52377&RefDoc=497473&evc=sm)
Headlamps Inoperative - Low Beams (http://service.gm.com/servlets/CellHandler?CellId=52687&RefDoc=497473&evc=sm)
Headlamps Inoperative - Right Low Beam (http://service.gm.com/servlets/CellHandler?CellId=52375&RefDoc=497473&evc=sm)

</TD></TR><TR><TD vAlign=center align=left colSpan=4>*Refer to the appropriate symptom diagnostic table for the applicable abnormal result.







</TD></TR></TBODY></TABLE>





FIGURE Cell 102: DRL Relay (All Except Envoy)(c)

(http://service.gm.com/servlets/BlobShtml?ShtmlFile=359585&pubid=67&evc=sm#oth1-359585)
http://service.gm.com/engif/000/000/355/355315.gif

Sorry about the schematic, wont let me resize it

Thanks for your replies, guys. All the fuses looked good. I'll try the tests that I am able to, Cobra....I don't own a TechII. I am plannign on taking it into the dealer for an allignment anyway, so I can have them check it out. Thanks Doc!


Tom :eek: