Printed circuit board

[rs2600]

Anyone has a working printed circuit board for my -70 Custom? I only need the board, all instruments are in working order. I live in Sweden which will make shipping expensive for a complete cluster.
/Mats

[peanutman]

Most of those circuit boards if used are coming apart. You can get just the board $99.95 from lmc or npd. Not sure what that will cost you in sweden but you don't need the whole cluster unless all guages are shot.
I would put a aftermarket manual oil gauge in anyway. The clusters you may be looking at in mags is just the plastic bezel. Whole setup if you could find all guages would set you back $675.00 american.
You can go used on everything except the circuit board and the voltage regulator that screws to back of cluster.

[rs2600]

Looks like the fuel guage has a short in it. The sending unit is working but the fuel guage goes all the way to full as soon as ignition is on even with wires disconnected at tank. I'll have to look into it a bit more.

[kaptnkaos]

There is a '70 only printed circuit board on ebay right now

http://cgi.ebay.com/ebaymotors/FORD-NOS ... dZViewItem

Looks like no one is bidding on it so far...

KaptnKA S

[rjewkes]

is it full guage or does it have an oil light and amp light? i have a 70 pcb for dummy light equiped trucks. it is nos. $10. USD plus whatever mailing it to sweden costs.

[l1k2gadd]

I have seen the fuel sender wiring that crosses over the driver's door (comes up the windshield pillar and goes down the rear quarter post) damamged and bare in wrecking yard vehicles. You may want to follow that wire under the dash (solid orange, I believe) and see if the ground (short) goes away when you unplug it under the dash where it plugs into the under-dash wiring harness.

Remember, your fuel gauge has a hot running to it and it is looking for the resistive ground from the fuel sender to give you a reading on the gauge. If a bare spot develops in the wire, or a screw is screwed through a body panel and grabs the wire your gauge will go to full, over full and possibly burn out if held there. I burnt a 1967 Mustang fuel gauge years ago trying to see if my fuel sender was bad.

[peanutman]

My fuel gauge was a 1/4 off before i replaced the circuit board and regulator. Not sure which one fixed it. Haven't gotten my oil gauge to work so i installed a manual aftermarket.

[rs2600]

It's probably grounded somwhere, I'll check into that. Otherwise, all instruments and lights are working fine.

[Underdog97]

If you disconnected the sending unit from the wires and it still nreads full then it's not the problem, not saying that it isn't bad but it's not the reason it still reads full. The next step I would do is to take the instrument cluster out of the truck or at least set it aside after undoing the speedometer cable and unplug the ORANGE wire coming out from right above the kickpanel and see if your gauge works correctly then. This would isolate the wire coming from over the door to the main harness as the culprit or not. If it still reads full then I'd run an ohm meter from the connector going into the main harness and touch the negative side of the meter to a good ground (battery disconnected). If there's a reading on the ohm meter then somewhere in the main harness is a direct short. To further double check I'd also use the ohm meter on the cluster itself from the fuel tank terminal to the guage.

[rs2600]

Thanks for all the input but I never got around to fix it, sold the truck.
/Mat