Back up light not working
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Junior User
Joined: Oct 2015
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From: Socal
Back up light not working
Hi there I own a1985 f250 4X4 4 speed.My back up lights don't work. I'm trying to find the wire that by the transmission. Where exactly is it? How does it look like?
FTE Legend
Joined: Nov 2015
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From: Angier, NC
What 4 sp trany do you have?
The wire should come from the left side (when sitting in the drivers seat) of the trany to the frame and plug into the main rear harness. That is how it was on both of my 81 trucks.
Dave ----
The wire should come from the left side (when sitting in the drivers seat) of the trany to the frame and plug into the main rear harness. That is how it was on both of my 81 trucks.
Dave ----
Lead Driver
Joined: Jul 2009
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From: Sheffield, AL
Have you verified that both bulbs are not burned out? What often happens is that one bulb will burn-out and it is not noticed. When the second bulb burns out, it is noticed. It is not uncommon to remove what may have been the original bulb(s) and find a dark yellowish paste on the base. This is the original dielectric grease used by the factory. With a soft cloth, remove as much of this from the socket as possible and replace the bulb. If you have dielectric grease, put a small amount on the base of the bulb to protect the electrical contacts.
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Joined: Nov 2007
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From: Denver Metro Area, CO
There is also a point where two harnesses connect where dirty/bad connections can cause problems - LH rear corner, where the harness extending across the rear connects with the harness running the length of the truck.
Also, user-added trailer hitch wiring causes problems.
My BW T18 has the switch on the top-rear of the transmission IIRC.
Also, user-added trailer hitch wiring causes problems.
My BW T18 has the switch on the top-rear of the transmission IIRC.
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Junior User
Joined: Oct 2015
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From: Socal
could I see how it looks like
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