| Spare wire in tail light wiring harness [message #92009] |
Thu, 15 July 2010 00:37  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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I want to use the spare light blue wire in the tail light wiring harness for a towed brake actuator. Where do I look in the harness at the front? and in the rear?
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: Spare wire in tail light wiring harness [message #92027 is a reply to message #92009] |
Thu, 15 July 2010 11:13  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| John Sharpe wrote on Wed, 14 July 2010 23:37 |
I want to use the spare light blue wire in the tail light wiring harness for a towed brake actuator. Where do I look in the harness at the front? and in the rear?
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John--there is a large multi connector near the joint where the dash intersects with the driver's side panel. I wanted to do the same thing and I can see the connector, but can't get at it. I suspect various coaches may be more or less accessible. At the rear, you can get at it on the driver's side--I can't recall if you can get to it thru the speaker hole or the tail light access panel, but it isn't difficult. I wanted to do the same thing but after looking at the gage of the wire, and the difficulty of reaching the front connector, I decided to run a separate wire.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Spare wire in tail light wiring harness [message #92043 is a reply to message #92027] |
Thu, 15 July 2010 13:12 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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My pickup up truck trailer brake controller wants a 12 gauge light blue wire for the brakes (the electrons in the wire do not like colors other than light blue.) How large is that Lt.Blue wire in the GMC. My controller will also handle uo to 6 wheels braking so I assume that some thinner wire would work if you only have 2 or 4 wheel brakes.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Spare wire in tail light wiring harness [message #92047 is a reply to message #92043] |
Thu, 15 July 2010 14:24 |
Surbo
Messages: 213
Registered: February 2004
Karma: 0
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| Ken Burton wrote on Thu, 15 July 2010 13:12 |
My pickup up truck trailer brake controller wants a 12 gauge light blue wire for the brakes (the electrons in the wire do not like colors other than light blue.) How large is that Lt.Blue wire in the GMC. My controller will also handle uo to 6 wheels braking so I assume that some thinner wire would work if you only have 2 or 4 wheel brakes.
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John;
Use the lt blue wire to run the coil on a relay, feed the relay with a heavier guage, fused wire and it will do the job much better.
Bob D in SESD
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