Headlight switch was not the problem.....

S

Shadance

New member
:bash: So my problem is that I basically have no headlights... N with that no fog lights.

I will clarify.. I have working DRL's which I have read to be dim low beams. N the only way I have high beam is by pulling the switch back in the flash position. So that basically rules out my headlights themselves being bad. I did some tests on my switch with a meter n wasn't getting anything at all.. So since I've checked all the fuses n swapped relays and all r good decided to get the switch. Well installed switch n still nothing. I believe that with the fog lights linked to low beam that is why I don't have those working. I haven't done as thorough a check with them cuz they r not such a priority.

This is on a '99 that is from Canada. (Not sure how much difference that's gonna make yet.) Confirmed at the dealer today when I tried to get a second key made....Well only 7 r allowed n I have that key. So I pd $40 for a door key at this point.. :( I have only had this Runner for a few weeks. Trying to get all the kinks out n get it back to looking n running good.. Loving this Runner already....Have always wanted one... I knew this was a project when we got it.. Junk yard lien sale.... So I have no history other than what is right in front of me...

So would the DRL keep the headlights from working through one of the relays or diode? I will have to see if I can find them.. Been looking at the wiring diagrams to see if I can locate them.. Is there a way to test relays?

If I'm missing any needed info please let me know... N Thanks In Advance for any help... I was so sure it was the switch.... Jennifer
 
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Shadance said:
:bash: So my problem is that I basically have no headlights... N with that no fog lights.

I will clarify.. I have the DRL which I have read to be dim low beams. N the only way I have high beam is by pulling the switch back in the flash position. So that basically rules out my headlights themselves being bad. I did some tests on my switch with a meter n wasn't getting anything at all.. So since I've checked all the fuses n swapped relays and all r good decided to get the switch. Well installed switch n still nothing. I believe that with the fog lights linked to low beam that is why I don't have those working. I haven't done as thorough a check with them cuz they r not such a priority.

This is on a '99 that is from Canada. Confirmed at the dealer today when I tried to get a second key made....Well only 7 r allowed n I have that key. So I pd $40 for a door key at this point.. :( I have only had this Runner for a few weeks. Trying to get all the kinks out n get it back to looking n running good.. Loving this Runner already....Have always wanted one... I knew this was a project when we got it.. Junk yard lien sale.... So I have no history other than what is right in front of me...

So would the DRL keep the headlights from working through one of the relays or diode? I will have to see if I can find them.. Been looking at the wiring diagrams to see if I can locate them.. Is there a way to test relays?

If I'm missing any needed info please let me know... N Thanks In Advance for any help... I was so sure it was the switch.... Jennifer
Click to expand...

I'm not sure I understand, you have DRL, but are they working? And neither high or low beams work in normal function, right?

Also, please tell me if any other systems are not working, besides the fog lamps.

Lastly I will call in my support team [MENTION=10169]TheDurk[/MENTION] because I don't have a 99 EWD, and he can see Canada from his house.

:popcorn:
 
Sorry for the confusion. I guess I shouldnt of posted when I was so tired.

Yes the DRL's work. Just no low or high beam when switch is turned on. Everything else seems to be working light wise after I found a bad dome fuse.
 
Shadance said:
Sorry for the confusion. I guess I shouldnt of posted when I was so tired.

Yes the DRL's work. Just no low or high beam when switch is turned on. Everything else seems to be working light wise after I found a bad dome fuse.
Click to expand...

OK, so let's try to solve the headlight issue first, since you have working DRLs, the fuses should be good, and the headlight relay sends voltage to those 4 headlight fuses, so that should be good too.

In order to switch from a partial ground(DRL) to a full ground(low beam) the DRL fuse#4 must be activated by the MAIN DRL relay. That relay is powered by the 7.5A DRL fuse, please confirm that fuse is good using a voltmeter or ohmmeter.

If that fuse is good, check the DRL relay #4

This relay is located in the right upper dash area, below the rightmost A/C register. You should have power to at least ONE terminal (terminal 4) for that relay. If you do, we can check the operation of that relay and the auto off function in the combination meter.

Let me know what you find!

:popcorn:
 
This sounds like the exact issue with my truck that I was chatting with [MENTION=10169]TheDurk[/MENTION] about a while back. I'll link that thread when I find it. I got most of the way through diagnosing it before a bunch of other things happened and it got put on the back burner. I do recall that relay on the right side being a bit of a ***** to get to.
 
Twan said:
This sounds like the exact issue with my truck that I was chatting with [MENTION=10169]TheDurk[/MENTION] about a while back. I'll link that thread when I find it. I got most of the way through diagnosing it before a bunch of other things happened and it got put on the back burner. I do recall that relay on the right side being a bit of a ***** to get to.
Click to expand...

Yes, but slightly different. So did you fix it? or are you just grounding the the lights and calling it a day? This is solvable, believe me!
 
It's still a problem, just hasn't been a high priority one, since it's not my only car, roads are well lit around here, and I don't drive much at night. I'll take care of it one of these days.
 
Thanks for the info everyone. If it's not raining to bad tomorrow I will get those things checked.. N I will read up on linked post when my little one goes to sleep. I went n pulled the relays from a parts t4r that was set aside at the junk yard we got this one from for me. N yes that #4 relay is a pain in the but....
 
Busy day..

Well all I got to do was verify that my drl fuse is still good... If my day isn't so busy tomorrow hoping to open up the dash and get to the #4 relay n also check the ground in that area... That is the ground for the headlights. The one on the drivers side is for the drl... Maybe I can get lucky n its the ground.. Was just looking thru the wiring diagrams n reading the info on them that came from the linked post.. So crossing fingers I come back with good news... ;)
 
Shadance said:
Well all I got to do was verify that my drl fuse is still good... If my day isn't so busy tomorrow hoping to open up the dash and get to the #4 relay n also check the ground in that area... That is the ground for the headlights. The one on the drivers side is for the drl... Maybe I can get lucky n its the ground.. Was just looking thru the wiring diagrams n reading the info on them that came from the linked post.. So crossing fingers I come back with good news... ;)
Click to expand...

Yes that relay does ground the headlights, by passing the DRL Resistor when the switch grounds the relay. BUT, you have to be sure it is getting power from the DRL fuse. AND that relay is grounded by the switch, but is also controlled by the MAIN DRL relay, and the auto off function in the combination meter.

Simple, but not THAT simple.

:snacker:
 
Haven't done a whole lot cuz I've been super busy but I had a question? Will the #4 relay show power via test light on the 4 wire when the head is on. I know it will click when switching to flash but I couldn't get power with a test light.. I trying to figure out if I have a bad wire nor connection from the relay fuse to the #4. I have replaced the fuse n still nothing. There is a connection between that I also found but couldn't seem to find power at either. I also just got a continuity test meter. I hadn't realized the one I had didn't have that option. . Haven't gotten to try it out yet. Hoping later today when we get back home. Also plan on pulling my fuse box under the hood n checking the connections there also..
 
Shadance said:
Haven't done a whole lot cuz I've been super busy but I had a question? Will the #4 relay show power via test light on the 4 wire when the head is on. I know it will click when switching to flash but I couldn't get power with a test light.. I trying to figure out if I have a bad wire nor connection from the relay fuse to the #4. I have replaced the fuse n still nothing. There is a connection between that I also found but couldn't seem to find power at either. I also just got a continuity test meter. I hadn't realized the one I had didn't have that option. . Haven't gotten to try it out yet. Hoping later today when we get back home. Also plan on pulling my fuse box under the hood n checking the connections there also..
Click to expand...

Anytime the HDLT Relay is active, you should have voltage at T4 of the #4 Relay, the DRL fuse also is powered by that circuit so if you have power at the fuse, you should have power at the #4 Relay.

According to the EWD for a 2000, it should be a yellow wire. That wire goes through a connector (IG3) at the driver's side kick panel. That is a 4 pin connector, T3 is the yellow wire.

Good luck!

:rockon:
 
Twan said:
http://www.toyota-4runner.org/3rd-gen-t4rs/151599-low-high-beam-inop.html
Click to expand...
So if this quoted right the link from Twan is exactly the same issue I'm having.

I have no power at DRL relay #4 terminal 4. I have rechecked my switch after replacing it didn't work thru my Haynes manuel n it is fine.. I get headlights when I ground the 8 terminal (red/blue wire on my t4r) n it doesn't matter if my switch is on or not.. So I'm guessing my next step is to pull the dash all the way out n chase wires n verify that splices r good n any other thing under there.. If anyone else has a better idea that would be awesome. Lol

Sorry it's been so long but having a toddler makes it hard to figure this thing out.. ;)
 
Shadance said:
So if this quoted right the link from Twan is exactly the same issue I'm having.

I have no power at DRL relay #4 terminal 4. I have rechecked my switch after replacing it didn't work thru my Haynes manuel n it is fine.. I get headlights when I ground the 8 terminal (red/blue wire on my t4r) n it doesn't matter if my switch is on or not.. So I'm guessing my next step is to pull the dash all the way out n chase wires n verify that splices r good n any other thing under there.. If anyone else has a better idea that would be awesome. Lol

Sorry it's been so long but having a toddler makes it hard to figure this thing out.. ;)
Click to expand...

No don't pull the dash. If you ground T8, and I'm assuming you mean at the switch because you didn't specify, then you have power at the relay. Because the red/blue wire is grounding T3 of DRL relay #4, thus allowing the headlight ground circuit to complete.

How are you checking for power? And I know you replaced the 7.5 A DRL fuse, but does it have power on both sides of the fuse?
 
I checked the relay 4 without the switch grounding n have no power showing there. I have used a test light on that at this point. I will check the fuse contact points with my meter.. I verified continuity for the fuse s I know it's good..
 
Shadance said:
I checked the relay 4 without the switch grounding n have no power showing there. I have used a test light on that at this point. I will check the fuse contact points with my meter.. I verified continuity for the fuse s I know it's good..
Click to expand...

I believe you that the fuse is good, but is there POWER at the fuse?
 
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