Will a dash wiring harness for a 97 s10 blazer work on a 91

you'll have to change the whole wiring harness an the computer .

Likely, it's the sender unit in the tank. To check wiring and your dash gauge, you can pull apart the connector at the fuel tank, find the wire for the gauge sender unit (its color coded-I dont kinow what the one for your car would be), and on the harness side(the one going to front of vehicle) use a jumper wire and ground that wire to the car frame(get me? you want to ground the wire going to your dash gauge)-with key on, your gauge working properly will move up to half-way or even full. That tells you your dash gauge is working and your wiring to gauge is good. If gauge doesn't move when grounded(double check for a good ground), then your dash gauge may be bad.

To Remove:

1. Open the glove compartment.
2. Lift the tab to allow the glove compartment to swing down.
3. Use a flat bladed tool to release the flasher from the harness connector.
4. Remove the flasher.

To Install:

1. Connect the harness connector to the flasher.
2. Secure the flasher with the retainer.
3. Swing the glove box up to the normal position.

look directly on the throttle body close to the linkage for the gas pedal it will be in that general area. look for a wire harness.

it generly works thru the brake light fuse, you prob have a vaccume leak causing it not too work!!

one is a return

check fuel pump relay first and yes it will

not really. IT is under the dash on the passenger side. You should put some plastic down or pull the carpet or it will get soaked with anti freeze

Your dash needs to come out. These bulbs push into a plastic piece that "twists" into the back of the dash board. (About a 1/4 turn) Unless you can get at them from underneath, but I think it's to tight.

i own a 1991 chevy blazer myself but my problem is opposet of yours my back lights stay on well i went underneath the dash board an i look up underneath my steering column an i saw to components one was to my cruise control an the one in back of it was to my back lights an i moved this around an to my surprise my light swork good now but now my speed odometer doesnt not work an my gas gauge am my oil aa water gauge my power windows dont work an niether my a/c or heater defroster im jus wondering if i need to move this component alittke more to the left or right yesterday everything worked hmmmm