All the lights in the gauge cluster dont light up along with all the ulimination. Also the tailight for when you turn your light on dont work only when you press the brake other then that nothing. the 15 fuse keeps on blowing but cant find the problem with anything.
TO TROUBLE SHOOT ELECTRICAL YOU MIGHT NEED TO TRY A GOOD BULB OF CORRECT TYPE INTO SOCKET IN BRAKE FIXTURE THEN ALSO MAKE CERTAIN THE REGULAR TAIL LIGHT ELEMENT IS GOOD REPLACE FUSE WITHOUT PRESSING BRAKE LIGHTS ON IF FUSE IS OK THEN TURN ON THE RUNNING LIGHTS SEE IF THE ONE IN QUESTION IS COMING ON IF IT IS AND THE FUSE IS OK THEN PRESS BRAKE PEDAL AND SEE IF THE BULB LIGHTS WITH THE BRAKE ON ALSO THE FOUR WAY FLAHER IF FUSE IF STILL GOOD IT MIGHT ALLOW DASH LIGHTS TO COME ON MANY VEHICLES HAVE A SAFETY WAY OF LETTING YOU KNOW YOU HAVE NO TAIL LIGHTS BY ALSO TURNING OFF THE DASH LIGHTS.
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what lights, you wean the cluster warning lights are dead.
or the cluster park , illimunation lights are dead.
are parks working (outside)
are head lights bright? outside)
wont start, does that mean it wont CRANK?
that means the starter is silent or is just a click
nobody can answer (correctly) lacking those facts.
1: check all fuses.
2: head lights work if not battery terms are rusty clean them.?
3: key on.
4: CEL lamp must glow, (check engine light) if not fuses blown or battery is dead. for sure.
4: tune key to start, does starter spin crank shaft fast?
ill stop here. my wild guess is you will not get this far.
seems to me (id use my meter to find truth) a short in the HL.
head lights. and possible wrong size fuse in that circuit too.
find a good ASE shop. they will make short (no pun) work of this.
or buy a DMM and ask how to do this.
or inspect all HL wires for shorts.
it also seems to me the park lamps side is shorted.
but i cant see dash and the effect.
are you saying the warning lights in cluster or blinking
or the cluster back lights flash.
if back lights , that is PARK (via dimmer) in the dash.
so if the backlights dim that means the park feed is shorted.
but, like I said, I never guess. I use a meter.
Get a Beck Arnley alternator. The auto-zone, Napa etc. alternators are a problem for Isuzu's. I worked at a dealership and a lot of them came in for this problem. If you still have the original have it rebuilt. Check yellow pages.