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Engine swap Electric problems, HELP!!

  
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Engine swap Electric problems, HELP!!

 
cemarek cemarek
New User | Posts: 4 | Joined: 04/08
Posted: 04/21/08
11:23 AM

I have a 94 K1500 with the 5.7 TBI, automatic 4L60. Everything was working fine, it just had high mileage and some leaks, well a lot of leaks, rear main included. I purchased a new 5.7 crate engine and swapped all of the stock parts over to it, all the sensors, throttle body assy, and hooked up all of the wiring harness as it was before.  It fired right up and everything is working well except the windshield wipers, A/C, and cruise control. I lost all three of these functions.  I checked the fuses and none are blown, the fan control works and cycles through the fan speeds, but the a/c wont kick in. With my meter I found that the wiring harness to the wiper motor assy is showing 12vdc+ on the hot wires were it should, but now also shows 12vdc+ on the ground wire.  And the feeder wire to the washer fluid motor now shows ground instead of 12vdc+.  I was sure I plugged all the harness back in right, and most of those plugs only go one way.  Can anyone help me figure out what happened? I am near north Houston Texas and as its getting hot, I need the A/C and wipers more than the cruise, but I will take any help I can get!!  Thanks in advance....  

 
bryancarz bryancarz
New User | Posts: 45 | Joined: 05/08
Posted: 06/02/08
10:21 PM

That truck should have 2 ground wires at the front of the engine. One usually goes to a stud at the thermostat housing and the other usually goes to one of the intake manifold bolts at the front of the engine. Make sure they are hooked up and have good connections.
When you are testing the ground wire at the wiper motor, what is the color of the wire you are testing? I can fax you a wiring diagram for the wipers on that truck if you want, I don't know what you are going by.  

 

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