questions about my truck

fordman · Post by **fordman** » Tue Sep 25, 2007 10:42 pm

that explains it then.

1971ford · Post by **1971ford** » Tue Sep 25, 2007 10:45 pm

i almost want to set up some flood lights around and in my truck so i can start tracing the square button of mystery! i cant wait to findout what it is. then ill have to get my brake warning light working. so how does that thing work/what does it do? and is there just a bulb or something that goes in the silver socket thingy? anyone have a picture of one?

fordman · Post by **fordman** » Tue Sep 25, 2007 10:48 pm

it should come on when you turn the key on. if it doesnt the wirng is messed up or the bulb is bad. the light will only come on after its running if there is a problem with the brake fluid system.

1971ford · Post by **1971ford** » Tue Sep 25, 2007 10:50 pm

i dont know if mine works because i dont have a bulb. so is there just a bulb that screws in there or is there a bulb that screws in and a cover that goes over the bulb or what?

fordman · Post by **fordman** » Tue Sep 25, 2007 11:18 pm

a bulb goes in there somehow and there is a cover that holds it into the dash.

1971ford · Post by **1971ford** » Wed Sep 26, 2007 7:32 pm

i have some good news and some bad news.
the bad news is that that button isnt for oil slicks.
the good news is that i was able to trace alot of the wires coming from the button(5 of 6 or something like that).
2 go and end at the glovebox.

1 goes to the thingy on top of the in cab tank.

1 goes to the unit under the cab that all the hoses go into. here is a picture if you dont know what im talking about:

1 goes into the engine compartment, and into the frame rail, the it goes in between the rail and the under bed tank and it doesnt comeout the other side so it must go to the under bed tank.

so im thinking that this button is the fuel tank switcher.

or a fuel gauge switcher

if there is even such a thing. what do you think it is?

Post by **FORDification** » Wed Sep 26, 2007 9:23 pm

Yep, looks like someone decided to wire in an electric solenoid to switch between fuel tanks, replacing the manual valve that came stock on our trucks. That might be the setup from a dentside-era truck...they had such a solenoid, and the dash switch was by the heater controls.

1971ford · Post by **1971ford** » Wed Sep 26, 2007 9:27 pm

interesting...
Thanks for the help!
so the PO moved the floor hibeams switch to a dash switch and moved the manual tank switch to an electric button on the dash. interesting.
should there be holes or any sign of where the manual switch used to be?
thanks again.

1971ford · Post by **1971ford** » Wed Sep 26, 2007 9:36 pm

well back to the brake warning light...
here is mine:

so i just need a bulb and a little cover that goes over it? or just a bulb? where can i get these things?
thanksss

fordman · Post by **fordman** » Wed Sep 26, 2007 10:12 pm

the bulb would be at the parts store the red lens you might be able to get one on ebay or from the aftermarket people like lmc or dennis carpenter.

1971ford · Post by **1971ford** » Wed Sep 26, 2007 10:15 pm

i dont know what the bulb looks like or anything though. ill check DC for the lens because i know LMC dosnt have it.
anyone have a picture of there warning light so i can see what it looks like?

1971ford · Post by **1971ford** » Wed Sep 26, 2007 10:35 pm

i just ordered a DC catalog. ive never even bought from them before. im waiting on the catalog now.

fordman · Post by **fordman** » Wed Sep 26, 2007 10:37 pm

from what your pic looks like you have every thing for the warning like except the red lens. the outer bezel is there and the socket has to be there or it would be in the dash.

1971ford · Post by **1971ford** » Wed Sep 26, 2007 10:39 pm

i just need the bulb and the lens. there is wiring going to the socket and there is a socket.

theogre5150 · Post by **theogre5150** » Thu Sep 27, 2007 8:26 am

They don't sell just the lens. You will need to buy the entire warning light. They still sell them but I can't remember where I saw them. Probably DC. You can also go to a junk yard and try to find one there. I see them all the time whenever I go. Here it is lit up:

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