Truck wiring question

Posted by NC Wayne on March 27, 2007 at 17:51:52 from (64.12.116.141):

Just finished building a beavertail and drop gate for a buddy's '98 Isuzu NPR HD truck so he can use it for landscaping and am trying to get it wired up. I've run into something I've never seen before and am wondering how to wire it and more so how I can wire a "normal" trailer plug to it. Every system I've ever dealt with has the standard two filiment bulb with the running lights on the dim filiment and the signals/brake on the brighter one. In other words the brake signal is running in the same wire as the turn signal to the same bulb filiment, so if you have the brakes on and turn on the turn signal what happens is the turn signal overrides the brake signal to make the light flash and when you turn it off the brake still keeps the bright filiment lit. This truck isn't like that, it has three wires, a left turn, a right turn, and a brake wire, all independent of each other. I've checked the signal wires to see if the energize with the brake and they don't, and the brake wire doesn't energize with either signal wire, and if I hook the say the left signal and brake wire together all that happens is the front signal lights when you hit the brake and the signal doesn't cancel the brake. I know I can wire it with each wire independent and the brake going to light other than the one used for the signal but doing that doesn't help when I try to wire a trailer plug for a trailer that has standard two filament lights. Anybody know anything about this particular truck and the odd way it's wired and does anybody have any ideas what I need to do for the trailer plug. Even better does anybody have or know where I can get a wiring schematic for this truck since I've also got some more troubleshooting to do on it before it leaves the shop. Any and all views, ideas, tips, or whatever you can offer would be greatly appreciated.

Replies:

• Re: Truck wiring question Leland 21:58:17 03/27/07 (0)
• Re: Truck wiring question RodInNS 19:21:42 03/27/07 (0)
• Re: Truck wiring question george md 18:56:46 03/27/07 (0)
• Re: Truck wiring question Armand Tatro 18:46:35 03/27/07 (0)
• Re: Truck wiring question dan67 18:45:23 03/27/07 (0)
• Re: Truck wiring question The Preacher 17:59:08 03/27/07 (1)
  • Re: Truck wiring question NC Wayne 18:26:11 03/27/07 (0)

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