'89 F250 lighting wiring?

[cscmc1]

Anyone know of a decent onlline wiring manual for an 89 7.3 4x4 supercab? My lighting is acting up -- no taillights or brake lights! Someone had spliced in a brake controller, and "unspliced" it at some point, so there are several wires disconnected. I fiddled for a moment, didn't think I altered a thing, and now my taillights are stuck ON. Go figure.

Anyway, any .pdf's or anything of the sort would be dandy, or simply a recommendation for a decent manual (Chilton?) would be helpful. Thanks in advance!

Chris

 

[tonkadoctor]

Haynes manual 36058 has good wiring diagrams in it for the chassis and lights for f series and bronco from 1980 to 1996. Most Advance autoparts stores carry it in stock. Pg 12-50 is the one you need and unfortunatly my scanner is down right now

here are the colors for the tail lights,

Brown - Tail lights, license plate lamps, rear park lamps on chassis cab
Light green & orange - left brake/turn signal
Orange & Light blue - right brake / turn signal
Black - Ground

If your lights are constsantly on and you're working under the dash all I can think of is that you are tapped into a constant hot like the light green and red that goes to the brake light switch or the red & white that goes to the hazzard flasher.

 

[cscmc1]

Thanks, tonkadoctor. I use Haynes on all the imports I own and have owned; didn't know they had one for Ford trucks! I'll buy one today!

 

[tonkadoctor]

You're welcome Chris. The truck manual doesn't cover the diesel engine but they do have a techbook that covers the diesel in depth #10330 it covers the GM 5.7, 6.2 and 6.5 and the Ford 6.9, 7.3 IDI and 7.3 Power Stroke.

Mike
BTW when I bought these manuals they were both on the shelf at Advance, Autozone said they could order them

 

[cscmc1]

You were right -- Advance had them both on the shelf! I went home, removed the electric brake controller (it was beat up anyway) and clipped a few extraneous wires. Now my lighting is acting as it should! I ought to pick up some SCA test strips now and see how urgently I need to get to a coolant flush. Wonder if Advance carries those?

Thanks again!

Chris

 

[tonkadoctor]

You're welcome Chris. For the SCA strips I'd probably call Napa or Carquest as they sell heavy truck parts or check with a local heavy truck or farm tractor dealer, You can also get them from Ford. You have a much better chance of them actually understanding what SCA test strips are than one of the "Box" stores like Advance or Autozone.