1990 Ford Ranger dash light and fuel gauge

  • 1990 FORD RANGER
  • 4 CYL
  • 2WD
  • 94,000 MILES
When I bought this truck I replaced all of the fuses but the interior lights including the dash light wont work. Also the gas gauge doesn't work. I've heard that it may be the floater in the gas tank but I don't know. Please respond as soon as possible.
Do you
have the same problem?
Tuesday, August 26th, 2008 AT 2:21 PM

1 Reply

Before replacing the sending unit/floater assembly I would make sure that it's not something else (relay, wire, or a faulty gauge).
If the gas gauge doesn't move (stays on empty) when the ignition key is turned to the "on" position, current may not be reaching the gauge. Connect a jumper wire between the ignition switch and the dash gauge. If the gauge now works, replace the defective wiring between the gauge and the ignition switch.
If the gauge reads high at all time, try grounding the tank unit electrical terminal to a good known ground (clean chassis). If the gauge jumps to empty or below, the tank unit is OK, but there is a bad ground between the gas tank and the body or chassis.

As far as the interior light, do you read a voltage at the bulb? You could have a faulty wire, faulty ground connection etc. My guess is that if the light doesn't even come on, not even dim, there is no current reaching the bulb meaning that you have a problem in your wiring like an open, bad ground, superduper high resistance (less likely if your bulb is completely out and not at least a little dim), or your bulb is broken (that would be the easiest fix).
Was this
Tuesday, August 26th, 2008 AT 4:45 PM

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