Solenoid ohm readings/testing - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Lounge (6) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Transmissions > 4L80/85E Transmissions. 6L90 Transmission
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Closed Thread
 
LinkBack Thread Tools
Old 03-25-2009, 10:05 PM   #1 (permalink)
bullet2five
Diesel Enthusiast
 
Join Date: Mar 2009
Posts: 24
iTrader Score: 0 reviews

Solenoid ohm readings/testing

MY MISTAKE-DELETE POST PLEASE-Just wondering if anyone can steer me in the right direction on checking shift solenoids during a rebuild. I have a build DVD and manual that shows they should check 15-25 ohms or so. All 3 of mine were at zero. I will double check again, maybe try reversing leads for a different reading, maybe a mistake on my end. thanks Dave

Last edited by bullet2five; 03-26-2009 at 07:35 PM. Reason: mistake
Offline  
Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-25-2009, 10:26 PM   #2 (permalink)
modified
Diesel Master
 
Join Date: Oct 2003
Location: NE Wisconsin
Posts: 3,125
iTrader Score: 0 reviews

I'm not familuar with these solenoids in the trans and the circuitry, but,
when you checked them, were they wired up, or did you have at least one of the coil leads disconnected from the electrical circuit?
When measuring resistance, there is no lead polarity on a resistive only circuit.

Did you verify zero ohms with test leads shorted together, before taking measurement?
__________________
Modified

2002 Chev 2500HD Dmax/Allison X-Cab LB 4WD, B&W Goose Hitch with Companion 5th Wheel, Highway Products Tool Chest, Jordan Ultima 2020, Frederico sway bars front & rear, Air Lift SD Bags

Last edited by modified; 03-25-2009 at 10:27 PM.
Offline   Quick reply to this message
Old 03-26-2009, 07:34 PM   #3 (permalink)
bullet2five
Diesel Enthusiast
 
Join Date: Mar 2009
Posts: 24
iTrader Score: 0 reviews

I checked them with the digital fluke today, they came in at 17-21 ohms. I am calling that good enough. Threw that old meter away. My mistake, sorry.
Offline   Quick reply to this message
Old 03-26-2009, 08:35 PM   #4 (permalink)
modified
Diesel Master
 
Join Date: Oct 2003
Location: NE Wisconsin
Posts: 3,125
iTrader Score: 0 reviews

Fluke saves the day.
I had simular results trying to measure the engine coolant heater and cord at 11-13 ohms, or glow plugs at a simular low resistance.
I always liked the old reliable analog meters, but you can't beat a digital at these low resistance values.
__________________
Modified

2002 Chev 2500HD Dmax/Allison X-Cab LB 4WD, B&W Goose Hitch with Companion 5th Wheel, Highway Products Tool Chest, Jordan Ultima 2020, Frederico sway bars front & rear, Air Lift SD Bags

Last edited by modified; 03-26-2009 at 08:39 PM.
Offline   Quick reply to this message
Old 03-27-2009, 07:50 PM   #5 (permalink)
GenBiltstein
Diesel Master
 
GenBiltstein's Avatar
 
Join Date: Nov 2007
Location: Prince George, Virginia
Posts: 1,839
iTrader Score: 0 reviews

Armed Forces Club Member

18 to 24 Ohms Dave. I have been using Digital multimeters for years.

Take a nine volt battery and soldier two leads to it and actuate the shifting solenoid. You will hear the click. If there is a good solid clicking sound then there is nothing wrong with the solenoid.
Inspect the O-ring for leakage.
The screen for clogging.
Did the transmission ave a problem shifting or slow shifting? If so then sheck the shifting valves for sticking.
Check the internal wiring in the transmission. Pin E feeds the 1-2 and the 2-3 plus the tcc solenoid. The computer controls all three through ground.
For fourth gear both the 1-2 and the 2-3 will engage.

GB
Offline   Quick reply to this message
Old 03-27-2009, 10:28 PM   #6 (permalink)
bullet2five
Diesel Enthusiast
 
Join Date: Mar 2009
Posts: 24
iTrader Score: 0 reviews

No problems shifting, just a super hard 2nd gear snap. Then it wanted to fall out when ya let off the throttle. I am hoping it will be ok after all the work I have put into it this last week or so. Thanks for the reply
Offline   Quick reply to this message
Sponsored Links
Advertisement
 
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fish bite: optic filter harness, line pressure solenoid, or TCC solenoid? HSadventures 6.5L Diesel Engine 17 11-08-2011 01:37 PM
P0763 Locked in limp mode? Replace solenoid c? Top solenoid?Confused, please help! rmkleman Allison OEM 6 03-15-2011 01:24 PM
Vin S solenoid testing procedure? crankme69 6.5L Diesel Engine 2 03-14-2010 12:23 AM
followup - testing shutoff solenoid Falcor 6.2L Diesel Engine 2 04-05-2009 10:20 AM
Now have trouble code 78 for waste gate solenoid. pump or solenoid? bob1121 6.5L Diesel Engine 12 02-10-2008 04:13 PM


All times are GMT -4. The time now is 10:59 PM.


Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0