Headlight problem..no low beams

[jcolvin]

Low beams /parking lights just stopped working. High beams work fine, but the blue high beam indicator doesn't come on any more. Checked the bulbs...no problems. Both headlight fuses ok (left and right fuses). There's power getting to the lights, so the problem is in the ground switch circuit. The top terminal on the 3-prong H4 plug sees ground when the lights are off, but looses ground when I turn the switch on, while both other terminals see 12 v. Any suggestions? I'm thinking the switch in the steering column, but should I check anything else before I go pulling stuff apart? Is there a relay in the right hand side kick panel that controls the ground switching? Or is ground switched through the switch in the steering column?

Oh yeah...this is a JDM HDJ81 (12 v). Actually if anyone has a scan of the EWD for a HDJ81 that they could post it would be great.

 

[hdJOCE81]

Low beams issue

Did you found a solution for that issue. I have the exact same problem you had that happened yesterday.

Thanks in advance

 

[jcolvin]

Crap, I have no memory at all of what I did to fix. And my bad for not putting the solution on afterwards. Vague memory that it was a bad ground, but my brain cell's aren't sure.

 

[Dave 2000]

This is a very common fault and happening more often as the 80 model gets older. Yes the earths do give problems but in 8-10 cases it is one of the relays in the fuse box, there is changeover relay and a power relay, they are both prone to getting hot and not only burning themselves out but often take the connectors in the bottom of the fuse box with them.

Pull the relays and check them with known good ones but also have a REAL good look at the connectors in the box.

regards

Dave

 

[hdJOCE81]

Thanks guys for quick answer. Just to confirm do you mean the POWER MAIN RELAY and the CIRCUIT OPENING RELAY. I tested the Headlight Control Relay and it's fine same for it's connexion in the box. Will investigate after for ground fault if the relays you suspect are good.

 

[Dave 2000]

I am away from my car at the moment, IIRC there are TWO relays which are responsible for powering and changing the beams, they are beside each other in the fuse box and one of them is Black and the other Brown, also going from memory they do interact with each other but that is open to speculation, I used a friends relay to do the diagnosis but cannot remember the finer details, hope that helps.

regards

Dave

 

[hdJOCE81]

Hi Dave,

You mean the fuse box in the motor compartment or the relay block close to the accelerator pedal?

Regards,

HDjoce81

 

[Dave 2000]

In the engine compartment

regards

Dave

 

[elhombre]

When I first got my rig, it had this problem. It was the relay in the engine compartment. I think I replaced it with a toyota brown one. Many, Many beers ago though..........

 

[Dave 2000]

When I first got my rig, it had this problem. It was the relay in the engine compartment. I think I replaced it with a toyota brown one. Many, Many beers ago though..........

Yep, pretty common (minor) problem as these great beasts start to age. I had it happen to me and think I posted it on my ongoing thread, (Dave wanders off and has a look around).



Aha! It is in here I think it was around the end of last year but for some reason the thread shows 8 plus pages one day and then 5 the next? https://forum.ih8mud.com/80-series-tech/365673-my-lc-80-thread.html

Post 113 is where you will find the headlamp issue.

Regards

Dave

 

[jaime pinzon]

me paso lo mismo y solo era destapar el tablero indicador y bajar el cuadrado de luces y cambiar el bombillo estaba fundido gracias