I have a 2006 Peterbilt 378 The problem I’m having is the AC and windows stop working, but later it will start back on it’s on. This problem is continuing to happen, do anybody have any helpful information.
Wiring problem
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by klcrawfordklc, Aug 2, 2020.
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When you say the a/c stops working. Do you mean the a/c compressor or the blower motor? It sounds like a relay is overheating
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The power to their AC/Heater controls and the power windows controls.
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It’s the power to the ac/heater control and windows controls.
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OK, Sounds like The relay is overheating
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Okay thanks I will try locating that relay now and replacing it.
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Change relay but still same problem!
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Ok, check the wiring at the a/c compressor. Trace the 2ires as far as you can. Check for frayed, bare wires. -
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Okay I will trace it this evening once I get back in. Thank you so much for your continuous help!
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