Question about 1990 Isuzu Pickup

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I have have a 1990 isuzu pickup. the hazard lights work but the signal lights dont. i know its not the flasher i clicks really fast. i have good bulbs.

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May be in signal selector switch....

Posted on Mar 20, 2011

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Hasards dont come on on a 2000 isuzu trooper


No need to panic-this can SEEM TO be caused by a couple of things, but it is fairly simple to determine exactly what is causing this flasher circuit condition.
First, turn on your flashers, however you have to do it, and walk around the truck to check that all bulbs are working (at least one on each corner). Turn signal and hazard flasher relays are thermal circuit interrupters and are current sensitive and will not work properly with too few or too many bulbs in the circuit. (This is usually a big problem when switching over to LED lamps, as LEDs only draw a fraction of the current that the bulbs do. This causes the relay to either not flash at all or flash very fast and triggers warning circuits on newer cars) If there is one or more bulbs out, they must be replaced.
That being said, I doubt that alone is your problem. Here is a general automotive wiring primer aimed at the turn signal, hazard, stop, and running lights on most all motor vehicles.
Hazard flashers are required by D.O.T. safety standards on all motor vehicles that may ever be used anywhere near a public road. They are also required to be able to be used without the ignition key. This means the flasher circuit for hazards is fed thru a fuse that connects straight to the battery and is energized at all times.
Turn signal circuits often share the same flasher relay as the Hazards, even though the power for them is switched through the ignition key. Power for directional blinkers connects to a fuse, then the ignition switch, then to the battery.
So, if you have to turn on the turn signals (is the key on?) to get hazards to work, that means they are not getting power direct from the battery, but can get it when the turn signals are on because they both use the same relay. This is usually the case on all vehicles; If 4-way flashers and turn signal are both on at once, the 4-ways override the turn signal and force all signal bulbs to flash. The turn signal never forces one side of the hazards to stop blinking.
So, where does that leave us? You simply have a blown fuse, my friend. The hazard lamps fuse may also power the cigarette lighter, dome light, or other "always on" accessories. This varies with make & model, but the Hazard Lps fuse is usually well marked in the fusebox. If the fuse blows again shortly after being installed, do not put in a larger one! Try one more. If it also blows immediately, there is a problem with the wiring, or a bulb could be in wrong and shorting to the socket ground. Try removing all the flasher bulbs and trying the switch(it won't flash or "tick-tock") again. If the fuse does not blow, you have found the problem. Good hunting!

Apr 15, 2013 | 2000 Isuzu Trooper

1 Answer

I have a 1982 Isuzu pickup. My flashers work but my hazards don't


Check the switch and may be on seperate flasher unit

Aug 05, 2012 | 1990 Isuzu Pickup

1 Answer

I have a 2005 GMC w-4500 cab over box truck. The turn signals do not work. I have checked the fuse in the glove box, checked the flasher under the dash. The hazard lights work, but neither turn signal.


that could have two flashers one for the turn signals and one for the hazards lights.if you turn the hazard lights on and the flasher you located, you should feel it click as the lights flash.if it does it could possibly have another one for turn signals. sometimes it is a square relay in the fuse panel. and could be a problem with the turn signal switch this is the same as a isuzu npr.

Sep 15, 2011 | GMC W3500 Cars & Trucks

1 Answer

I have a 1991 isuzu space cab pickup and the passenderside blinkers dont work all for flashers work and drivers side does but when i click to the left it just makes a tick tick tick really fast but no...


I think this is common in these trucks, I usually whack/wiggle my hazards switch (on the top of the steering column), and it fixes my blinkers. More than likely there is a short between the hazards and the blinkers. Hope that helps.

Jan 04, 2010 | 1991 Isuzu Spacecab

1 Answer

I have a 92 lumina. The turn signals dont work.


The hazard lights has it's own flasher, change the flasher for the turn signals and see if that works. To find out which flasher it is, put on the hazard lights, and put your finger on the flashers, which ever one you don't feel clicking is the turn signal one.

Nov 14, 2009 | 1992 Chevrolet Lumina

2 Answers

Turn signal flasher location 2004 impala


It should be in the hazard button, You have to pull it out and replace it. Try the junk yards they dont cost alot.

Oct 09, 2009 | 2004 Chevrolet Impala

1 Answer

My hazards in my 1997 camaro rs work, but the back and front turn signals dont. The lights for the signals dont work in the dash either, just the lights for the hazards


check the signal flasher ( little silver or colored can in fuse panel or under dash. 4 ways have 1 flasher and the signals have a seperate flasher. Put hazards on to hear click, to determine which flasher is which. Hope this helps

Apr 13, 2009 | 1997 Chevrolet Camaro

1 Answer

1992 isuzu pick up


It is usually near the hazard flasher an looks the same.

Aug 26, 2008 | 1995 Isuzu Pickup

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