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Patrick levenson (Zubzub)
Registered Member
Username: Zubzub

Post Number: 112
Registered: 5-2007
Posted From: 70.52.28.153


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Posted on Saturday, October 10, 2009 - 7:39 pm:   

So it's time to run some new 14 G wires (plus a 3/8 air line ) front to back on my bus. My time is always short with the bus so tips on ways to do it would be appreciated. I had a look in the bays, and other than drilling holes through all the bay walls it is not clear where I should go. How about the main harness that goes from the front relay panel to the rear panel, is there room in its run to fit more wires? As always all info appreciated.
Peter E (Sdibaja)
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Username: Sdibaja

Post Number: 316
Registered: 5-2002
Posted From: 71.223.45.135


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Posted on Saturday, October 10, 2009 - 7:56 pm:   

on the 4905 I used the old AC pipe from the condenser bay to the pump bay, what a pain in the butt, and it was only a few wires that I could pull.

just drill the 4 or 5 holes at the top of the baggage bays and use the biggest PVC or ABS conduit you can swing, you will be glad you did
john w. roan (Chessie4905)
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Username: Chessie4905

Post Number: 1689
Registered: 10-2003
Posted From: 71.58.71.157


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Posted on Saturday, October 10, 2009 - 10:27 pm:   

There should be removable panels in ceiling of baggage compartments to access space where wiring runs; be careful not to put it where any moving items would interfere. Underneath the coach, there 2X3 inch deep ribs that you could easily mount conduit in. You will need to cut a clearance hole the diameter of conduit at every bulkhead as the through ribs are blocked by the thickness of the bulkhead (about 1/8 inch). The ribs end at front axle area and rear axle area. There you could switch to the liquid tite flexible style conduit and continue to engine compartment area, bottom of electrical panel to the left of driver, voltage compartment area, etc. Use of about 1 to 1 1/2 inch diameter would give much space for many wires. You could pull 12 to 15 or more wires. I wouldn't use less than 12 ga for the smallest wires, except for a gage or tach. You could consider a couple of 10 ga and one or two possibly of #8.THHN stranded is available at Lowes or Home Depot and others; very durable with tough outer covering. One other thing, if you take the time to check those wires in the driver's panel and regulator compartment, you will find many unused circuits from front to rear. Remember, bathroom, pony engine, etc. are no longer there, leaving several unused circuits. GM also included several spares for optional equipment that was never installed in a lot of the coaches. That wiring is very WELL protected with the possible exception of where it comes out of the rear bulkhead above rear axle. That asphalt impregnated fabric that covers the wire bundles may have deteriorated from constant barrage of water, dirt, salt etc.You'll need to check this area.

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