the truck i just bought may have a cursed CDL :-\
i found out shortly after buying the truck that the CDL did not engage, and have been trying to track down the problem. here's where i'm currently at with it.....
nature of problem:
when i put the truck in 4L, i can hear the relay behind the kick panel clicking, but DO NOT hear the "whirring" noise of the actuator, and the CDL and ABS lights on the instrument cluster do not come on. The CDL does not engage.
background on truck:
bone stock '93, no F/R Lockers, no CDL switch. 155K miles.
what i know so far:
* Checked both fuses for CDL. they are fine.
* Shorted the "Transfer Switch Indicator" per instructions on Slee's site, and the ABS and CDL lights came on, so i know that the bulbs are good.
* Checked the "Transfer Switch Indicator" switch on the front of the t-case. i pulled it and checked the resistance. it showed no difference between open and closed (greater than 1000Kohm) so i replaced it.
* Checked the switch on the back of the t-case and it showed greater than 1000Kohm when open, and between 0 and 400ohm when closed. occasionally it would show as little as .3ohm, but mostly in the hundreds. does this indicate that it is bad?
* Put the truck on a lift in 4L, and physically verified that the CDL is not engaged by trying to turn the wheels independently.
Given what i know for a fact is working, can i make any assumptions as to what is definately OK. i would like to be able to skip diagnostics on parts of the system, if i can infer from what i know IS WORKING. I'm not so good at reading electrical diagrams.
What direction should i move now on this one.
thanks in advance,
ivan
i found out shortly after buying the truck that the CDL did not engage, and have been trying to track down the problem. here's where i'm currently at with it.....
nature of problem:
when i put the truck in 4L, i can hear the relay behind the kick panel clicking, but DO NOT hear the "whirring" noise of the actuator, and the CDL and ABS lights on the instrument cluster do not come on. The CDL does not engage.
background on truck:
bone stock '93, no F/R Lockers, no CDL switch. 155K miles.
what i know so far:
* Checked both fuses for CDL. they are fine.
* Shorted the "Transfer Switch Indicator" per instructions on Slee's site, and the ABS and CDL lights came on, so i know that the bulbs are good.
* Checked the "Transfer Switch Indicator" switch on the front of the t-case. i pulled it and checked the resistance. it showed no difference between open and closed (greater than 1000Kohm) so i replaced it.
* Checked the switch on the back of the t-case and it showed greater than 1000Kohm when open, and between 0 and 400ohm when closed. occasionally it would show as little as .3ohm, but mostly in the hundreds. does this indicate that it is bad?
* Put the truck on a lift in 4L, and physically verified that the CDL is not engaged by trying to turn the wheels independently.
Given what i know for a fact is working, can i make any assumptions as to what is definately OK. i would like to be able to skip diagnostics on parts of the system, if i can infer from what i know IS WORKING. I'm not so good at reading electrical diagrams.
What direction should i move now on this one.
thanks in advance,
ivan