64mgb

iTrader: (1)

I want to take my gauge cluster completely apart...I got it as far as the pictures show, and didn't want to ruin it trying to get it the rest of the way apart. How do you take the circuit board off the back?

Thanks,
Rich

Stevan

iTrader: (17)

I took one off a 70 mustang to repair it, it looked somthing like that. If you take out all the bulbs, and remove the nuts and screws holding the gauges in, it should come off.
But, Iv'e never done it on a 7.

Steve.

trochoid

iTrader: (6)

Why stop there Rich. The gauges come out and can be replaced individually, though the side gauges are paired as single units. Remove all of the nuts and screws from the back, it's pretty straight forward.

What is the purpose for the dis-assembly?

64mgb

iTrader: (1)

Thanks trochoid -

This is the spare cluster I bought because my oil pressure gauge doesn't work right. I just want to see what's in it and see if it's goin to be possible to fix the gauge. I was able to fix the fuel gauge in my '79 many years ago.

Rich

IanS

iTrader: (4)

it is the 2 nuts behind the oil pressure gauge that you want to remove. It should simply slide right out after that.

64mgb

iTrader: (1)

Here's what the oil pressure gauge looks like for anyone that's interested. I'm surprised that the wires show no signs of overheating. I'm going to tinker with it. It looks like there are a couple of adjustments on it.

Rich

64mgb

iTrader: (1)

Hey! It worked! By tinkering with the adjustments at the top of the oil pressure gauge, I was able to make it read right again. The picture with the gauge at 60 pounds was taken with a variable resister set to 141 ohms, and the power supply set at 14.4 volts. The one with the gauge at 110 pounds was taken with a variable resister set to 102 ohms, and the power supply set at 14.4 volts.

There are two adjustments at the top. The one with the red line pointing to it seemed to have more effect on the zero setting, and the one with the yellow line pointing to it seemed to have more effect on the full scale reading.

It's a good thing I got this one working...the one in the spare cluster I bought off eBay doesn't work at all...and I made sure I asked the seller if they all worked.

Rich