48 gmc truck gauges switch to S10 12 volt???

I've got a 48 GMC Truck that I did the s10 frame swap on, totally awsome!
I kept the 4.6 liter s10 motor and auto tranny in it for now and will swap it for a 350 in the future- I also used the wiring harness from the s10, gas tank, computer, ect..
question I have is I want to use the original gauges that I refurbished, I have bought the 6volt reducers.
the 91 s10 had electric gauges, not digital. can someone help me with the wiring diagram how to hook the original gauges in my 48 GMC to the wiring harness of a 91 S10
I've got the pinout for the plug in on the S10 gauge cluster (18 pin)
or if it doesn't work hooking to the wiring harness, can someone give me a step by step on hooking up the gauges to the various sending units (oil is mechanical) thanks!!

 

Speedo - if you got a mechanical sender on the tranny, hook it up, if not, get one

Ammeter - it don't care about voltage - hook it between the battery and the alternator

Temp - get a sender for the 48, or go mechanical

Gas - you got problems, the gauge is 30 ohm, the sender (S10) will be 90 ohm, replace sender with 30 ohm

 

Can i put a 60 ohm resistor inline for the fuel?
also what do you mean get a sender for the 48 temp? temp sensor that screws into the block? is it different than what I've got now in the S10? Iv'e got 2 of em, my guess is one is for the computer and one for the gauge

also ammeter, is there a right and a wrong way to hook it up or will it just read backwards (discharge instead of charge) if you hook it up wrong

 

for the speedo I gutted the 48 speedo housing and modified the S10 electric gauge to fit in the 48 housing.

may not be super accurate, but I can "learn" to use it-
and it looks original except for no odometer

 

I don't think that you can do any tricks with the fuel gage, I would pull the sender and fuel pump from the tank, and adapt a generic 30 ohm sender in place of the stock unit.

As for the temp sender, I doubt either of the stock S10 senders are gunna work correctly with the 48 gauge.

You're correct on the ammeter, backwards it will just show discharge. Make sure you make good connections here, ALL the juice for the truck is going thru this guy.

 

I found some info on the fuel issue- if I put a 47 ohm 1 watt resistor inline to the sener it should work, this will also work for the temp sensor if I can find the ohm resistance to the 48 sending unit- like you said, the fuel was 30 ohm,
any ideas on the temp sensor what ohm it should be? what the range is?