wiring diagram
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Joined: Dec 2004
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wiring diagram
Does anyone know where I can get a wiring diagram for a ' 38 1/2 ton? I'd like to add another tail lite and probably a heater. What can be done for defrosting? Does it make any sense to keep the 6 Volts since all the gauges work (ex. the fuel gauge) but the wiring needs to be replaced. Thanks, more later! JH
Lead Driver
Joined: Oct 1999
Posts: 6,774
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From: Kalispell, MT
You might try Mac's web site - if you don't find the one for your truck you can probably come close. I have a '48 pickup, so some of your questions are beyond my info.
http://www.vanpeltsales.com/FH_web/f...electrical.htm
Gauges: Ford used 6V gauges up thru the mid-70's. Every dash has a voltage regulator on or near the gauge cluster to drop from 12 to 6V. So you don't need to change yours if you go with 12 - just get a regulator from a junk yard or local parts store.
Lights are easy to upgrade to dual taillights - I think (been 4 years) my connections came with the turn signal I added. Picked up a crossover wire to go from the driver's side to pass side. I did have to run a separate ground wire to frame from the pass tail light housing before it would work properly.
http://www.vanpeltsales.com/FH_web/f...electrical.htm
Gauges: Ford used 6V gauges up thru the mid-70's. Every dash has a voltage regulator on or near the gauge cluster to drop from 12 to 6V. So you don't need to change yours if you go with 12 - just get a regulator from a junk yard or local parts store.
Lights are easy to upgrade to dual taillights - I think (been 4 years) my connections came with the turn signal I added. Picked up a crossover wire to go from the driver's side to pass side. I did have to run a separate ground wire to frame from the pass tail light housing before it would work properly.
Last edited by mtflat; Jan 12, 2005 at 01:26 PM.
New User
Joined: Sep 2003
Posts: 21
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From: Livermore Colorado
Wiring dia
I have some I can email - seems car &truck pretty much alike. Malpais@peoplepc.com
Some heaters have defrost outlets on the fan - can send a photo if you like
Some heaters have defrost outlets on the fan - can send a photo if you like
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