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I have a 71 F350 and have replaced the cab and reused the front clip(fenders/radiator support). The old cab was a wiring nitemare as everything was rewired. Horn,turnsignals,oil,amp, well you get the idea. There are two wires, one on each side where the wiring harness goes thru the firewall that have been cut on both cabs. It is one wire on each side and goes thru firewall seperately and goes to a block on pass side to the right of glove box. The wires are red. Another wire on the connecting block is black and goes back into the wiring harness under dash. Where do the wires go under the hood?
I was looking for someone with similar truck to take a peek under their hood and tell me where the wires terminate. The one on drivers side comes thru the firewall just below and to the left of the large wire bundle and has a female connector. Pass side is just below and right of large wire bundle. Both has their own grommet.
I do not remember for sure on the 71 but if it is like the 1968 then:
You said RED wire and the only Red (without any stripe) wire is the wire 284 for the Emergency warning flasher. The box you talked about must have been the Glove Box and yes the switch for the Emergency warning flashers was in the Glove Box.
Does your Emergency warning flashers work?
I do not remember for sure on the 71 but if it is like the 1968 then:
You said RED wire and the only Red (without any stripe) wire is the wire 284 for the Emergency warning flasher. The box you talked about must have been the Glove Box and yes the switch for the Emergency warning flashers was in the Glove Box.
Does your Emergency warning flashers work?
I haven't put battery in as yet because of several electrical issues. The new cab has emergency flasher pull out button on lower part of dash near the cigar lighter. there are two flashers hanging under the dash, one for turn sigs and other emer. The cab I put on was from a 70F250.
The termination block can hardly be seen unless you remove the glove box insert or really look up with strong lite above the fresh air door. One part looks sorta like the little voltage regulator for dash lites.
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