OBS AC Wiring Help with 0411 5.3l Swap
#21
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Thread Starter
My Test Light did illuminate during Engine Run / AC On at the Cycling Switch Light Green wire.
Shorting those Pins together seemed to have no effect.
There was Power at the 2 left pins of the AC Relay in the Undehood Fuse Block.
I was not able to get continuity to ground at any of the pins for the Relay.
I'd swapped the Fuel Pump and AC relays before. They both must be good.
Thanks,
-Kyle
#24
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Thread Starter
Yeah...that did work. There's 12v there at Key Off...
So, pulling the bottom right (in that photo above, pin 85) to ground ought to make the AC come on too then, right?
The ECM is supposed to be pulling that to ground?
So, now to determine why it's not?
It might be expecting Pressure Switches that don't exist?
I broke down and texted 'him'. He'd made a comment while he had it that he'd figured out why my AC didn't work. I noted it, but didn't get any more information. Apparently it was important. It had been working decently 'til that point.
Thanks,
-Kyle
So, pulling the bottom right (in that photo above, pin 85) to ground ought to make the AC come on too then, right?
The ECM is supposed to be pulling that to ground?
So, now to determine why it's not?
It might be expecting Pressure Switches that don't exist?
I broke down and texted 'him'. He'd made a comment while he had it that he'd figured out why my AC didn't work. I noted it, but didn't get any more information. Apparently it was important. It had been working decently 'til that point.
Thanks,
-Kyle
#26
Launching!
Thread Starter
Yeah...I'm not sure exactly what year it was.
I was roaming around the Junk Yard looking for something else and noticed how unmolested the Harness looked on that 4-door OBS.
I couldn't let it go and spent about 2 unscheduled hours very carefully extracting it from the Engine Bay.
The connections on the back of the block were particularly tough. I even completely removed the Bulkhead Connector and the Fuse Block. It was even a 4x4, too!
Once 'he' got it, I expect that it should have all been taken care of properly. What was I thinking?
Thanks,
-KP
I was roaming around the Junk Yard looking for something else and noticed how unmolested the Harness looked on that 4-door OBS.
I couldn't let it go and spent about 2 unscheduled hours very carefully extracting it from the Engine Bay.
The connections on the back of the block were particularly tough. I even completely removed the Bulkhead Connector and the Fuse Block. It was even a 4x4, too!
Once 'he' got it, I expect that it should have all been taken care of properly. What was I thinking?
Thanks,
-KP
#27
Launching!
Thread Starter
The Haynes Manual has an AC Page for '94 and earlier and '95 and later.
-Kyle
-Kyle
#30
Launching!
Thread Starter
Thanks!
That is a better Diagram. The color is helpful. And the 'breakout location' info is helpful, too.
Any chance you've got a Higher Resolution version? Some of the Breakouts I can't really read from over here...
Thanks,
-Kyle
That is a better Diagram. The color is helpful. And the 'breakout location' info is helpful, too.
Any chance you've got a Higher Resolution version? Some of the Breakouts I can't really read from over here...
Thanks,
-Kyle
#31
Ok to add to the confusion The 98 truck i said earlier matches what you have for colors at the A/C accumulator, that truck is a diesel. I just had time to go out back and look at my 98 2500 5.7 gas and it matches the diagram I posted above and has the BLK/wht and the Dk. GREEN wires at the cycling switch.
#33
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Thread Starter
Yeah, well add in the Motor Swap, the multiple hands inside and 23 years of me owning it and no wonder it's not working.
Thanks,
-Kyle
Thanks,
-Kyle
#35
Launching!
Thread Starter
Yes there is...
Thanks,
-Kyle
Thanks,
-Kyle
#37
Launching!
Thread Starter
No...but I wouldn't expect them to. They're different colors.
Thanks,
-Kyle
Thanks,
-Kyle
#39
Launching!
Thread Starter
Apparently not...
Thanks,
-Kyle
Thanks,
-Kyle