[tj761981]

can any one tell me if there is any other parts to change on my 6.2 glow plug wiring system besides the relay and the glow plugs? i have power to a brand new relay and i changed the glow plugs but the relay still wont click and the light wont come on either . there is plenty of volts to crank the engine cause i just put two new batteries in ? any ideas? thanx

 

[DavidPhillips]

Most of the time it's just a bad ground.

However the old systems are a lot different than the new ones and they all have their different ways about them.

So you need to update your signature to show what your vehicle information is.

Also check out the FAQ's thread in this forum for some simple troubleshooting ideas. Also check out the 6.2 forum.

 

[tj761981]

is there a controller behind the air cleaner assembly tha can short out and go bad?

 

[Dieseldreamr]

your best bet would be to check out the 6.2 section, but i would suggest bad grounds or bad connections somewheres.

 

[tj761981]

thanx i'll check out the6.2 section

 

[knkreb]

I'll take you over there for more 6.2 eyes to see it.

 

[High Sierra 2500]

Welcome to the forum! :welcome2:

Yes, there is a controller behind the air cleaner that can go bad. Yes, there are other parts that can fail as well...

First of all, it would really help to know what year this truck is. Early models ('82-'84) had a different glow plug setup than the later trucks had.

Welcome again! :welcome:

 

[tj761981]

I'd like to thank everyone for the tips , i read an earlier thread about rerouting and making the glow plugs come on using a momentary switch. this was a big help and she's up and running agian.

 

[tj761981]

does anyone know if the fuel gauge on a 84 gmc 6.2 is fused in the panel or some where else ?mines not working and i want to try anything I can before i drop the tank and check out the float . thanx

 

[jdemaris]

does anyone know if the fuel gauge on a 84 gmc 6.2 is fused in the panel or some where else ?mines not working and i want to try anything I can before i drop the tank and check out the float . thanx

Just take the wire that goes TOO the tank sender, and ground it. The gauge - if working - should go to full. quite often, when the gauge stops working on the 80s trucks, it's the ground wire connection to the tank that goes bad and causes the gauge not to work properly.

In regard to your glow-plug guestion - if you are sure you have a relay (on the drive's side inner fender), then the system also has a thermal controller, and a inhibitor-sensor. So - there are three comonents besides the glow-plugs themselves. The later systems does not have a separate relay - the controller and relay are unitized.