NON- Motorcycle tech question

[herm]

so,...i only have vehicle issues when i am about to get them imspected, travel long distances, etc....

if you own a ford super duty, and/or are mechanically gifted, would you please PM me?

my reverse lights are out, and ive checked all the fuses (that i know about), the bulbs, and all the wiring that i can see. does anyone know of some super secret hidden fuse somewhere that might solve this problem before i pony up for a mechanic?

[NAKID]

Have you checked the wiring coming off the tranny under the truck? Could have been knocked loose or broken by road debris...

[herm]

Have you checked the wiring coming off the tranny under the truck? Could have been knocked loose or broken by road debris...

yup...

[Howie]

The reverse light switch (might be incorperated into the neutral safety switch)?  Shift linkage adjustment?

[NAKID]

Is it an auto or manual?

[herm]

Is it an auto or manual?

1999 ford
F250 super cab/super duty
8 foot bed
32 gallon tank
4x4
7.3L power stroke diesel
6 speed manual
201,000 miles

[NAKID]

Did you look/feel around on TOP of the tranny? Sorry, just trying to think of everything...

[herm]

Did you look/feel around on TOP of the tranny? Sorry, just trying to think of everything...

far as i could reach

[erkishhorde]

I guess you already checked the light bulb? Is it even a different light bulb than normal braking and turn signals? Iono, just trying to be useful 

[Jeff_S2R1K]

I think the wiring harness diagram is available on the Ford site somewhere.   At least the transmission diagram is definitely available somewhere because there's a PTO available on the Super Duty that comes off the transmission, I would imagine that would include wiring.

Update  I just checked the Ford site, they want you to pay for diagrams and publications.  That's weak.  All that stuff used to be free for body builders.

[hypurone]

Reverse light switch sounds like to me. Might be able to ident it by checking the wire color at the bulb sockets and tracing back to the switch or check all switches on the tranny for that color wire(s). Then disconnect and supply power or jump it and see if you get lights. Replace accordingly...

[Howie]

Herm, now that I know the truck has a manual transmission, crawl under that big truck and look for a 2 wire switch towards the rear of the transmission.  One wire is light blue, the other is blue with a pink stripe.  Remove the connector.  Jump the two wires.  A paper clip will work.  Turn the key on.  If the back up lights work, the switch is the problem.  If not, see if you are getting voltage to one wire at the switch.  If so, the problem is between the switch and the lights or you have a ground problem.

[herm]

HOWIE!!!

you rock my friend! you nailed it on the head. the switch is bad.
off to NAPA

[Howie]

HOWIE!!!

you rock my friend! you nailed it on the head. the switch is bad.
off to NAPA

Good news.

[herm]

Good news.

unfortunately, the replacement backup switch works no better than the old one