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Old 11-25-2009, 11:24 AM   #1
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'05 avalanche chassis wiring

i am looking for a source to find a wiring schematic for my coach HELP PLEASE
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Old 11-25-2009, 11:34 AM   #2
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JT- to my knowledge the schematics were never released to customers for your coach (or any of the Vansco multiplexed coaches).

What kind of problem(s) are you having? Maybe there is prior experience someone can offer.
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Old 11-27-2009, 02:37 PM   #3
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trying to ,locate the correct wire to hook my trailer brakes to,and the power source for the front shades. i am a retired mechanic and this is a nightmare without the right info. have you had any success in getting info from vansco?
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Old 11-27-2009, 05:53 PM   #4
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Vansco inputs/outputs are likely very close to the Limited coach I/O. There are a couple of documents on the ACA Tech Library under Chassis & Brakes for Vansco circuits. Check those out.

Also, the front shades are powered on the Ltd & SE coaches thru some low amp fuses located below the dash and by the driver's right knee. On mine you pull off a plastic plate held on w/velcro to access the fuses. If you have none there, I suspect the firewall has a fuse block w/those circuits. One each 3A fuse per shade on mine IIRC.
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Old 11-28-2009, 09:02 AM   #5
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Earlier model coaches had "spares" in the wiring bundles--but are hard to find. Folks with newer coaches can probably explain if a Vansco solution exists. I gave up early and ran a separate wire front to back for my trailer brakes--allowed me to determine proper wire guage. I also tapped into the main dc wiring buss on the firewall in front of the passenger and ran a curcuit (10 guage/40 amp delay fuse) over to the driver's side firewall--allows for an additional 6-curcuit fuse block to feed current/future electronic "toys" on the driver's side. [Tapped the trailer brake sensor curcuit into the coach brake assembly wiring under coach [ below driver's position].]
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Old 11-28-2009, 11:25 PM   #6
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As far as brake power, the best Vansco solution is to tap the brake light circuit @ the back of the coach w/a #18 or so to a relay coil to ground, then take brake voltage off the battery (w/a fuse in line) to the load contacts of the relay to the brakes you are powering. Here is Dale Gerstel's solution from an earlier thread.
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