Not sure if you read this or not yet, but I removed the last line of the previous post. What it said was I went ahead and checked female 2&3 behind the battery with the green plug disconnected and got a 118, but I never checked it with the green plug connected. It looked like it was another set of yellow/brwn, and yellow/blk wires which is why I checked it on the plug behind the battery. Not sure that it matters. Thanks.

 

I like female 2 and 3 getting 118, lets just make sure that wiring is going the direction I'm thinking. Some of the diagrams from this era had the male and female reversed. Please check continuity from pin 2 behind the battery to pin 35 on the ABS module. You should read nice low resistance if the wiring is heading that way. If that is correct then we now know that side of the circuit is good and we have narrowed down and eliminated part of the truck having the fault.

So when you checked behind the battery female 4 to 5 with the connector behind the left rear wheel disconnected you got no continuity? If this is correct then we narrowed down even more that the issue is somewhere after that connector behind the rear wheel. Please check the connector behind the rear wheel testing from pins 4 to 5 on both sides. Do this first with the green connector and the connector behind the battery disconnected. Then do it with the green connector reconnected. Then do it with the one behind the battery connected, Record the results of this test on each side as you make each change. So 4-5 male, 4-5 female readings, then connect the green connector and take 4-5 male, 4-5 female reading, then connect the one behind the battery and take 4-5 male and 4-5 female again. Make sure all connectors except the 3 we're working with are reconnected during this test including all modules plugged in. My hope is one side has the 61 reading and the other starts with no reading and when you connect the last connector you get the 118 reading.

 

Yes. Checking female 4&5 with the connector behind the left rear tire disconnected I got no change on my meter which would indicate zero continuity( I think). I am out tonight but will do the other checks tomorrow and let you know what I find. I feel we are getting close. Thanks

 

You were spot on with the first check. Female pin 2 behind the battery to ABS 35 was a very low resistance of 0.03. I am planning to check the other pins tonight yet. I will let you know what I find. Thanks.

 

Well another curveball. I went and checked pins 4&5 on the connector behind the back left wheel with the green plug disconnected and the plug behind the buttery disconnected and got as follows. I did check a couple other pins also. The other yellow/brn and yellow/blk.
male 4&5 = no change
female 4&5 = no change
male 5&6 = 61
female 5&6 no change.
With the green plug connected and behind the battery disconnected
male 4&5 = no change
female 4&5 = no change
male 5&6 = 61
female 5&6 = no change
With green plug connected and the plug behind the battery connected
male 4&5 = no change
female 4&5 = no change
male 5&6 = 61
female 5&6 = no change.

was really hoping for different readings but it still looks like I have a short somewhere else.

Let me know your thoughts and thanks again for the help.

 

Check male 4 to 6, male 5 to 7, male 4 to 7, and male 6 to 7. Do the same checks on the female side with every other connector connected properly. We might be on to narrowing this down.

 

Will do. This is on the left wheel connector correct? Thanks

 

Checked the connector behind the left wheel with everything else connected.

male 4&5 = No change
male 5&7 = No change
male 4&7 = No change
male 6&7 = 117
female 4&6 = 0.04
female 5&7 = 0.04
female 4&7 = No change
female 6&7= No change

Thanks for the help.

 

Ok male 6&7 having 117 is awesome! If I'm right about how the wiring is running based on the info you're giving me then we have this narrowed down to 25% of the circuit. Leave the connecter behind the wheel disconnected and check 6&14 on the OBD. That should read 61 ohms if I'm right. If it does get access to the air suspension control module C0867 It's on the left side a pillar The CAN wires on that are 16,17,18,and 19. With that connecter unplugged from the module check at both 6 and 14 on the OBD and also on the connector behind the left rear wheel pins 5 and 6 where you had the 61 and see which connector has the 61, obd or behind the wheel. Or if it goes away then the issue could be the air suspension module.

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You got it. I will check it out tonight after work, and let you know. Thanks