The Ford Barn - View Single Post - 1990 e350 460 7.5 liter Instrument Gauges

Dffraser · 01-10-2018, 12:42 AM

Recently I replaced my turn signal and now my fuel gauge and temperature gauge do not read accurately. The auto electric shop that installed the turn signal said it was my instrument cluster voltage regulator. I replaced it but the problem still persists. Specifically, when I turn on the heater blower the temperature gauge goes up.....when I turn on my headlights it goes up even faster. The gas gauge shows 3/4 full but the tank is 100% full. I ran a ground wire from the IC voltage regulator and the fuel gauge quickly went way beyond the “full” line. The upside is that I know the engine is not overheating. I have read that a faulty engine to chassis ground can cause this problem but I can’t find the ground. I have cleaned the battery to chassis ground on each battery but with no impact on my problem. Does anyone have a picture of the engine to chassis ground(s) or have any suggestions??

01-10-2018, 12:42 AM	#1
Dffraser Junior Member Join Date: Jan 2018 Posts: 11	1990 e350 460 7.5 liter Instrument Gauges Recently I replaced my turn signal and now my fuel gauge and temperature gauge do not read accurately. The auto electric shop that installed the turn signal said it was my instrument cluster voltage regulator. I replaced it but the problem still persists. Specifically, when I turn on the heater blower the temperature gauge goes up.....when I turn on my headlights it goes up even faster. The gas gauge shows 3/4 full but the tank is 100% full. I ran a ground wire from the IC voltage regulator and the fuel gauge quickly went way beyond the “full” line. The upside is that I know the engine is not overheating. I have read that a faulty engine to chassis ground can cause this problem but I can’t find the ground. I have cleaned the battery to chassis ground on each battery but with no impact on my problem. Does anyone have a picture of the engine to chassis ground(s) or have any suggestions??