Gauge cluster help needed

[powell72]

I guy that sells products to our shop just got done restoring a '72 k10 longbed. It used to have lights and he switched it over to gauges. Ever since he got it put back together the temp gauge and the fuel gauge don't work. He does have a gauge harness installed in the truck. He has asked me to take a look at it, have any of you guys ever ran into this or am I going to end up chasing wires?
By the way, I'll take some pics of it to post, it is SWEET!

[matthufham]

http://www.gmcpauls.com/Tech%20Tips1.htm
Swapping A Idiot Light Dash Out To Gauge Dash

The following is for a gauge dash this gives the numbered position of the wires in gauge dash and followed by what it supplies, then number from idiot light dash you move wire from.
1-Black with white stripe (alternator) This runs from the 12 R from voltage regulator and should have a inline fuse.
2-Tan (Brake warning light) Original position 2
3-Pink (Fuel Gauge) Original Position 7
4-Tan(Fuel Gauge) Original Position 4
5-Empty(not Used)
6-Dark Green (Temp. Gauge) Original position 5
7-Black(ground)Original Position 6
8-Gray(cluster light feed) Original Position 12
9-Medium Blue (Right turn) Original Position 11
10-Lt. Blue (left turn) Original Position 10
11-Lt. Green (high Beam indicator) Original Position 9
12-Black/w brown stripe use wire ran from the junction block near battery mounted to passenger side fender with a inline fuse located at junction block end.
Remove the wires from your loom plug and place the colors in the # on plug that corresponds with the color from list above. You will need to replace your idiot light temp. gauge for a temp. sending unit with gauges. The black and white wire feeds from the 12gRed wire off back of alternator and requires the use of 2-4amp inline fuses, this wire you need to make and run. The DARK BLUE wire that was originally in #1 position should be deleted because this was the idiot light for the oil pressure. If you need more info. ask.

[Palf70Step]

One thing I had heard everytime this swap was done, if a wire is wrong, it zaps the fuel guage. The temp guage may not work because it still has the idot light sensor instead of one for a guage. That's the only help I can provide at the moment. Mine is still in pieces.

[krazy_texan]

you have to be careful when taking the pins out of the plug because they are delicate brass pieces and i cant find them at any parts places or anywhere else.

[purple gas]

those pins were used in some other older vehicles too.. I just got an end at the wrecks ,, it didn't fit,, but I took the pins out, and they matched

[powell72]

Matt, am I reading that right, is that for making gauges work with an idiot light harness?

[Bob B.]

The temp. sending unit is different for a truck with gauges.

[matthufham]

Originally Posted by powell72

Matt, am I reading that right, is that for making gauges work with an idiot light harness?

yes, my post is exactly that. i copied it from gmc pauls and read it, it made sense except im not sure (i have warning lights) if my new style water temp sensor (for a gauge) will work with my lights cluster