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Back up lights

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Old Jul 17, 2007 | 08:54 PM
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Back up lights

Ok on my 76 it dont have back up lights. I cant find the wire to hook it up i know it use to have it when i was a little child but now that its my truck i cant seem to find the wire that goes to the tranny for reverse. Ok It use to have 3 on the tree then i put in a np435 and i want to fix up the reverse lights so anybody know where i should look at to find the wire for it? Thanks maybe a wire diagram?
 
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Old Jul 17, 2007 | 09:07 PM
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I have this

 
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Old Jul 17, 2007 | 09:33 PM
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thanks for the picture Dennis. Im haveing problem with locating the wire coming off the back up lights. I cant seem to find it no where on the truck. How would i go about wiring up new back up lights?
 
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Old Jul 17, 2007 | 09:58 PM
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You mean the wiring harness from the tail-lights does not have a wire (Black /red stripe) for them ?
 
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Old Jul 17, 2007 | 10:05 PM
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I am sure back at the tail lights there is one. I was just hoping to find the wire ran allready by the transmission. I dont really know how its hooked up does the wire go straight from the tail lights to the transmission? Where are the wires ran through out the vehicle?
 
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Old Jul 18, 2007 | 01:33 PM
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along the left frame rail then across at the back.
 
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Old Jul 18, 2007 | 01:54 PM
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ok and it plugs directly into the transmission? or does it have to be routed into the cab for anything? Sorry for the not knowing much about this.
 
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Old Jul 18, 2007 | 07:07 PM
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The harness for BU lights to the switch carries a POWERED wire and a Signal wire to the bulbs. when the transmission is placed in REVERSE..the power is allowed to pass thru it and back to the bulbs to illuminate them.
Once the Trans is taken out of reverse..the switch No longer allows power to flow thru it.
 
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Old Jul 18, 2007 | 08:09 PM
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ok the BU wires are what color?
 
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Old Jul 22, 2007 | 04:08 PM
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what color are the two wires i need to look for, under the frame under the left for th BU lights?
 
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Old Jul 22, 2007 | 05:53 PM
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I been fixing up the wiring on my truck and was wondering if this was the end for the back up light wiring? If so is the end of it the same so it can be plugged into the np435? thanks
 
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Old Jul 22, 2007 | 09:28 PM
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Originally Posted by rmalottwtes30
what color are the two wires i need to look for, under the frame under the left for th BU lights?
see post #4
 
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Old Sep 22, 2007 | 08:05 PM
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does anybody have a part number for the backup light switch shown in the picture above? I have been to all of my local auto parts stores and nobody has it, or even lists it. the ones they do have are totally different.
 
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Old Sep 22, 2007 | 08:22 PM
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What year truck?

For A/T They changed in 1978.

People..... please mention which transmission you have .
 
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Old Sep 22, 2007 | 10:45 PM
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sorry the picture above was for the 3 speed colum shift trans. it is in a 74 f-100 300 I-6
 
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