mechanical gauges
Posting Guru
Joined: Jan 2000
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From: Cullman Alabama
mechanical gauges
On making a real Oil Pressure guage for your late fords.
There is a shunt in the Printed circuit dash that you have to cut. Then solder a Small valur Resister across the Shunt, them go get a sending unit for the 460 or some such of yore that had a real guage.
Yes you can Tee in an after marked guage as well.
On the Heat guage rising. In short you have a bad sender or a bad guage. If it was the little Voltage regulator in the Dash, all your guages would be reading high.
The sending unit is just a variable resistor. If it's letting too much current flow the guage will read higher. I'd check or swap the sending unit first.
There is a shunt in the Printed circuit dash that you have to cut. Then solder a Small valur Resister across the Shunt, them go get a sending unit for the 460 or some such of yore that had a real guage.
Yes you can Tee in an after marked guage as well.
On the Heat guage rising. In short you have a bad sender or a bad guage. If it was the little Voltage regulator in the Dash, all your guages would be reading high.
The sending unit is just a variable resistor. If it's letting too much current flow the guage will read higher. I'd check or swap the sending unit first.
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Senior User
Joined: Jul 2001
Posts: 190
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From: Warrenton, VA
mechanical gauges
Well, I have replaced the sending unit for the temperature. It reads higher with the new one than it did with the old unit. Go figure!
WrenchHead
1979 F-150 Custom. 302 V-8 4-spd 2WD. 125,100 Miles
WrenchHead
1979 F-150 Custom. 302 V-8 4-spd 2WD. 125,100 Miles
Posting Guru
Joined: Dec 2000
Posts: 1,686
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From: Racine WI
mechanical gauges
i agree about the trouble installing an ammeter, i think it would be alomost impossible on any new car due to all the different power feeds and accessories that would have to be hooked up, i have seen ford ammeters in 73-79 and 80-86 that work and some that dont and have never been able to make one work that didnt work, of course i never replaced the actual gauge, my old lady has a chebbie with full gauges and i have a cougar with full gauges, and i will say that i do like the chevs gauges better as they all read on a normal scale with actual readings not a dang letter that says high or low or somewhere inbetween, i like to know the temp and psi of the oil not if its "normal" when ford will change this is questionable 
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WrenchHead84
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
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Jan 27, 2002 07:07 PM
