Dash Air - no power to clutch - Printable Version

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+--- Thread: Dash Air - no power to clutch (/showthread.php?tid=8639)

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Dash Air - no power to clutch - AlanJohnson - 08-12-2025

When I first got this coach, I had low voltage coming to the AC clutch on the engine (and this was burning out my compressor clutches), so I added a time-delay relay connected to a reliable 12v source. And activated the relay by the lower voltage wire coming from the front of the coach.  This worked for 6 years, but now I have NO voltage coming down the wire from the front of the coach. So nothing to activate the relay and engage the clutch.

At front of coach, in front of passenger seat, I have found the relay that sends power to the clutch when the Dash AC switch is turned on. The relay works, and I have 12v coming out of the relay, presumably going from there to the back of the coach. And I do not see any fuses identified for the AC... but since I have power coming out of the relay, I assume wherever the fuse it located, it is ok.

At the rear of the coach, curb side access door, there are wiring terminals, I found the wire marked for AC clutch. 0 volts.  

My questions:
1. Would there be any connections between where the wire leaves the relay located in front of passenger seat, and goes to the wire terminal at the rear of coach? The wire color, orange w/ yellow stripe, is the same at front and rear of the coach. Would the wire leave the relay and travel to a terminal post in front of passenger seat, before going to the rear of the coach? (I do not see any wire terminals identified as something to do with the AC at front of coach). It seems unlikely that wire got severed somewhere. It seems MORE likely there is some bad connector (that has been corroding and losing voltage). But I don't if there would be any other connection points... or where they would be before they get to the rear of the coach.

2. If I can't find this bad connector, I suppose I need to run a new wire from front to rear. Ugh. What would be easiest way to route a new wire? 

I hope I my description of the problem makes sense. Thanks as always!
Alan Johnson

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RE: Dash Air - no power to clutch - HoosierDaddy - 08-12-2025

I would check continuity of that orange wire with a volt meter or power probe. If it is problematic typically Newell provides other unused wires in the front/rear wire loom.

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RE: Dash Air - no power to clutch - Jack Houpe - 08-13-2025

I like the idea of the relay Alan good call. I have a wire tracer I bought off Amazon, Lowes, Home Depot sells them also and I use it all the time. Dean is correct there are a few spares running back to the engine

https://www.amazon.com/VDV500-820-Generator-Continuity-Ethernet-Telephone/dp/B07VYN98QV/ref=sr_1_4?crid=2ONBKRDRJ1GU2&dib=eyJ2IjoiMSJ9.E6g_KnRu5aPn_v40io4_95_Z-6bSwCq-jDNTMcZyT6uOhkzEkcuN4ZTi_Vw9BWTu0Wh-nRXn5b_L0k5mSwR84JWz8LlbA-0F48PomHxUcrzeqxFy1ZYiYxkDA9ue0xo1BsqQxZVMPap9-RMZ0J--DJEUX5xBw_3AqpJotGJTeM7GlY-bpT5dkde8TfeGooPunQ7UnOTl9YgKXXp9oguufmhtJF2cv6STHAjmZMvphc4.0GOU2JPlWI_Aw7vn_ZYaH4JurwKwxS5Z_TUx_6hVrCE&dib_tag=se&keywords=wire%2Btracer%2Belectrical&qid=1755079446&sprefix=wire%2Btracer%2Caps%2C189&sr=8-4&th=1

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RE: Dash Air - no power to clutch - AlanJohnson - 08-13-2025

Excellent idea on the wire tracer. I have one... and I haven't used it in a long time, so I had not thought about that. Also thanks for telling me about the spares. I didn't know this. Hopefully I have some of those if needed.

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RE: Dash Air - no power to clutch - Richard - 08-13-2025

Yeah, ditto on the relay, I added one on 512 also.

Check continuity at the low pressure cutoff switches. It may be in the engine compartment just forward of the compressor, or you may have one at the condenser up front.

Look in the rear wiring cabinet, passenger side engine bay.

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