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1986 Hino Headlights not coming on, relays not clicking in??

Headlights not coming on relays not clicking in, one relay has power on 3 wires and the other has no power. When i connect my old test light to the dead wire on the relay with power the park lights come on but no headlights.

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6ya6ya
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Posted on Jan 02, 2017

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  • 422 Answers

SOURCE: No headlights, or dash lights.

check the ground cable at the battery , youll see a break in the ground wire at the battery box, check to make sure the bolt is tight and not corroded (the break is the ground for most of the lighting )

Posted on Aug 25, 2008

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SOURCE: No headlights, or dash lights.

the head light switch

Posted on Nov 24, 2008

mnabi01
  • 94 Answers

SOURCE: 2001 s10 headlights will not come on all the time

are you sure the bulbs are o.k.? if they dont work on both high and low you have ground wiring problem. ground the black wire at the plug with lights on.

Posted on Jan 29, 2009

  • 1244 Answers

SOURCE: 99 chevy 1500 with DRL feature; headlights won't

change the headlight switch!! itself its broken inside the unner contacts

Posted on Jan 17, 2010

  • 2 Answers

SOURCE: 2001 Dodge Durango, headlights flicker

I had a similar problem on my 2001 Caravan. Turned out to be a loose connection between the frame control module and the fuse box. I unscrewed the frame/front control module from the fuse box and bent the tabs slightly to make better contact. Then tighten down the module securley. Need star driver to loosen screws

Posted on Jan 20, 2010

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Where can i find the headlight relay


This one is pretty easy to conceptualize if you understand how a relay works - and if can't then you should go read my All About Relays page so you can. You splice two 20A relays into the existing wiring harness right out near the headlights so one relay controls the low beams and one controls the high beams. Use the existing high and low beam wires coming from the firewall to trigger the relay, run a new high power feed (with a fuse!) direct from the battery, and hookup the existing high and low beam wires from the headlights to the "normally open" contact on the relays. The hardest part of all this is typically finding the right wires in the existing wiring harness and finding a place to mount the relays - the actual wiring is pretty easy. Any SPST/normally open relay will do, though most automotive relays are of the SPDT variety - just don't hook anything up to the "normally closed" contact on the relay (pretend it's not there) and you'll be fine.
Note that if you pick some really monster sized off-road headlights that draw more power than the ones that you can plausibly use "on the street", you must use higher amperage relays than what is mentioned here. You must also use the appropriate sized power wires and you may very well end up replacing all of the headlight wiring from the relays out to the headlights themselves

Sep 23, 2015 | Cars & Trucks

2 Answers

Headlights wont work


According to my wiring diagram, the headlight switch works a relay which is powered by two different fuses.
I would check the relay for voltage first.
You may need a repair manual to trace the circuits.

Dec 19, 2012 | 1991 Volvo 240

2 Answers

1986 toyota camry fuel pump doesn't receive power, where is relay located?


The typical placement for the relay is under hood, mounted to wheel well, it may be on either side. Look for rectangular plastic case about 3" w by 8" l with wires attached. To access look for clips holding top cover on pry clips out and remove cover. Relays are about 1.2" square, usually black, and can be removed by pulling directly up. Relay diagram should be on inside of cover. There will be more than one (sometimes as many as 8) and if diagram is missing have a helper turn ignition on and listen for a click to narrow down which relay it is. Often times all relays are the same and you can pull one out and swap it with another to see if pump will work. Good Luck.

May 01, 2012 | 1998 Toyota Camry

1 Answer

1986 volvo headlights won't turn on


Most common problem is burned connectors at the relay that switches from high to low beams. I think that in '86, the relay was still inside the car above the driver's left foot. If not there, it is toward the front of the passenger compartment on the driver side, between the front inner fender and the battery. If it clicks when you move the dimmer switch, you can follow the click to find it. If the wires are good, the relay contacts may have failed.
On my '91, I lost the low beams because the headlight circuit in the bulb failure sensor had failed. The bulb failure sensor was an orange can-shaped device directly below the steering column under the dash. The headlight low beam wires were gray, as I recall. A new sensor was $150, so I cut the wires and bypassed it. I figured I could tell if I had a low beam burned out. I did not need a warning light for that. The bulb failure sensor still worked for the tail lights.

Jan 22, 2011 | 1986 Volvo 740

1 Answer

Car would not start, cleaned all the battery connections and started the car, now headlights do not work, parking lights do, i have power to bulbs on the middle wire, no power to the outside wires on...


Most cars have a Headlight relay and within the relay different terminals will split the power to parking lights, headlights, etc. It is possible that part of the relay burned out while the balance still works. You may have a fusible link (wire) to the relay box for just the headlights. A good Autoparts place should show the requirements.

I suspect the bad connection on the battery caused the Starter to draw power or a ground through the easiest path of least resistance. This shorted the grounded Relay.

Nov 17, 2010 | 2001 Mitsubishi Montero Sport 4WD

2 Answers

My headlights stopped working on my 1996 dodge dakota and i need to know what to look for to fix the problem.


First check fuse. If OK, find headlight relay in relay box under hood. Turn on lights, pull relay out, and use a test light to test each terminal in the socket for power. There should be 2 hot terminals, one from th ebattery and one from the switch. If you have only one, your switch or wiring are bad. Next, plug the relay back in and listen for a click as you do. If you had 2 hot terminals, the relay should click. If not, replace the relay. If you have 2 hopt terminals and the relay is working, the problem is in the wiring going form the relay box to the headlights. If you have more questions, please let us know.

Sep 15, 2010 | 1996 Dodge Dakota

1 Answer

Headlights don't work. Need wiring diagram for


Easy as pie..
Go to Autozone.com. Register yourself... it's FREE
Type in your vehicle info... year, make, model, eng..
Go to repair guides section. It's all there. PLUS you'll get the costs while you're on the site!

FYI: if you're not registered, you can't view guides and manuals.

Jan 29, 2010 | 1986 Volvo 740

2 Answers

Starter clicks but doesn't fire engine. Just put in a new battery. Occaisionally, on the 5th or 6th try it starts.


Yes. the starter is malfunctioning at this time. it could also eb a ignition issue as well. here is a quick starter test procedure that will help you troubleshoot a bit.


Step 1 Check for 12 volts on the large wire attached to the top terminal on the starter relay. It should have battery voltage. If not, the battery, terminals or wire is bad.

Step 2 Check the small wire on the solenoid for power when the key is in the start position. Remove the small wire on the solenoid and have a helper hold the key in the start position. Check the wire for battery voltage. If there is voltage, the starter is bad. If there is no voltage, replace the wire.

Step 3 Check the fuse in the fuse box under the hood on the left fender well. If it is good, check the relay by pulling it out and checking for power at one terminal with the key off. If there is no power, the problem is in the fuse box between the fuse and the relay. If there is power, have the helper hold the key in the start position once again and check for power at another terminal from the ignition key. If there is power, the relay is bad. If there is no power, the starter circuit is suspect.

Step 4 Check to see if there is power to the neutral safety switch if there is no power at the relay. Use the voltmeter to check for power with the key in start. If there is power going in, check for power going out. If there is no power going in, the security system or ignition switch is suspect. If there is power going in and none coming out, the switch is bad. If there is power coming out, the problem is between the neutral switch and the relay.

Step 5 Remove the cover on the bottom of the steering column. Check the solid yellow wire for power when the key is in the start position. If there is no power, the ignition switch is bad.

Sep 21, 2009 | Dodge Caravan Cars & Trucks

1 Answer

My 1992 Corolla DX headlights won't come on! I have changed the fuses and the bulbs. The relay clicks when turning the switch and the wiring seems to be in good condition but I am no electrician. The...


Power flows from the battery to the main fuse. Then it flows to the control coil and contact side of the headlight relay. When you turn on the headlights, the headlight switch provides ground to the control coil in the headlight relay and that operates the contacts. The contacts allow power to flow to the right and left hand headlight fuses. Power flows to the headlights. The headlight switch is what provides ground to the high and low beams on the headlights.

To diagnose, remove the headlight relay. Using a voltmeter, check for battery voltage on terminals 3 & 4 in the socket with the key in the RUN position. Then turn on the low beams. Test for good ground on terminal 1 in the socket. If you're not getting ground, then you've got a problem with either a bad headlight combo switch or a bad ground. If you get good ground on terminal 1, reinstall the relay, turn on the low beams and test for power in the headlight sockets. If you get battery voltage, that confirms you've got good fuses and wiring up to that point. Next, check for good low beam ground on the red/green wire in the bulb socket. If you're not getting good ground, it's either a bad combo switch or bad ground from the combo switch. Then turn on the high beams and check for good ground on the red/yellow wire in the bulb sockets.

It wouldn't hurt to clean the ID ground on the left side of the instrument panel, but based on everything you've said so far, this sounds like a bad combo switch

Jul 26, 2017 | 1992 Toyota Corolla

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