Topic: No power to headlights. Bad fuse? Missing fuses?

[SO Teen]

Does anyone have a picture or a diagram of the fuse box under the dash for an 89 Toyota pickup 22re. I can't seem to find one online so I have no idea if it is put together correctly or If I'm missing any. Here Is a photo of it.

Also wondering why I have no power to the headlight fuses under the hood.

Thank you for all your feedback. It is greatly appreciated.


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[Snowtoy]

Do you have power to the rest of the truck?  If not,  check the fusible link from the battery to the main fuse box in the engine bay.

[SO Teen [OP]]

Do you have power to the rest of the truck?  If not,  check the fusible link from the battery to the main fuse box in the engine bay.

Yes I have power to everything except the low and high beam head lights. I even bought new ones thinking the old ones were out but they still do not work


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[Snowtoy]

The headlight fuses in the engine compartment operate the head light relays, they don't have any voltage until you turn the headlight switch on, they activate the headlight relays which IIRC are wired directly to the battery.

Inner fuses

[SO Teen [OP]]

What are you saying? Sorry I'm confused. They have no power even when the switch is turned on that's the problem. What is IIRC? And if that's the cover for the inner fuse box then does that mean I have too many fuses in mine? Or is that not the same cover?

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[Snowtoy]

IIRC is If I remember correctly.

If there is no voltage to the engine bay headlight fuses w/the headlight switch turned on, then the problem is at the switch or relay.

My '90 3.0 and '91 22re both have the same layout which is the following


Yours should be


Do you hear the headlight relay under the dash click when you turn the headlight switch?
Do the high beams come on when you pull back on lever?
Do the dash lights come on when you turn on the headlights?

[emsvitil]

If I remember correctly, Toyota has the lighting circuit backwards............

The switch doesn't supply current to the headlights, but grounds the headlights......

[Snowtoy]

If I remember correctly, Toyota has the lighting circuit backwards............

The switch doesn't supply current to the headlights, but grounds the headlights......

Correct, it completes the ground for the relay.

These links may be helpful
https://www.yotatech.com/f116/headlight-problem-fixed-low-beams-dont-work-but-high-beam-indicator-229946/
https://www.yotatech.com/how-tos/a/toyota-4runner-1984-1995-electrical-diagnostic-guide-414700

From the FSM

[SO Teen [OP]]

IIRC is If I remember correctly.

If there is no voltage to the engine bay headlight fuses w/the headlight switch turned on, then the problem is at the switch or relay.

My '90 3.0 and '91 22re both have the same layout which is the following


Yours should be


Do you hear the headlight relay under the dash click when you turn the headlight switch?
Do the high beams come on when you pull back on lever?
Do the dash lights come on when you turn on the headlights?

I hear a click when I turn the switch. No the high beams do not come on. Yes the dash lights come on. How do I know if the problem is at the switch and if so how do I fix it?


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[Snowtoy]

I hear a click when I turn the switch.

Are you hearing the "click" of the switch, or the tail light relay?  Do you have taillights?  Do the taillights work?

Yes the dash lights come on.

With dash lights working, it is likely not the switch, especially if the taillights work as well.

How do I know if the problem is at the switch and if so how do I fix it?

Test the continuity of the switch for the headlights at the harness under the steering column, you will need a multi tester to test the continuity. The page from the manual  I posted shows you where the terminals are in the harness, and what two you need to test the continuity of, it also shows how to test the relay.

Have you tested the headlight relay?

[helipilot77]

Diagram:

[SO Teen [OP]]

Are you hearing the "click" of the switch, or the tail light relay?  Do you have taillights?  Do the taillights work?

 
With dash lights working, it is likely not the switch, especially if the taillights work as well.

Test the continuity of the switch for the headlights at the harness under the steering column, you will need a multi tester to test the continuity. The page from the manual  I posted shows you where the terminals are in the harness, and what two you need to test the continuity of, it also shows how to test the relay.

Have you tested the headlight relay?

Yes the clicking is coming from the headlight relay. Yes the taillights work. Where do I go now?


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[Snowtoy]

Looking at your first pic posted, it appears that you don't have the headlight relay plugged in the pic you posted, as well as a possible blown fuse.


Do you have the fuse box cover?  If so, does it look like this?


If it does, then part of the problem is not having the headlight relay installed.

[SO Teen [OP]]

Looking at your first pic posted, it appears that you don't have the headlight relay plugged in the pic you posted, as well as a possible blown fuse.


Do you have the fuse box cover?  If so, does it look like this?


If it does, then part of the problem is not having the headlight relay installed.

Yes I have the cover and yes I do have a relay there I had just taken it out For the photo. But they still do not work I am going to replace the one under the dash and see if that works.


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[Snowtoy]

Yes I have the cover and yes I do have a relay there I had just taken it out For the photo.

Just checking.

I am going to replace the one under the dash and see if that works.

No point in replacing the relay under the dash, it is for the taillights.  I asked about it and the dash lights to try and rule out a ground issue.

Can you hear the headlight relay(engine bay) click when you turn on the headlights?  Should be able to hear it if you stand outside the truck and turn the headlights on.

You can test the relay, or just buy a new one.

When you were checking voltage at the headlight fuses, did you check to see if you had voltage at the relay?

[SO Teen [OP]]

Just checking.
No point in replacing the relay under the dash, it is for the taillights.  I asked about it and the dash lights to try and rule out a ground issue.

Can you hear the headlight relay(engine bay) click when you turn on the headlights?  Should be able to hear it if you stand outside the truck and turn the headlights on.

You can test the relay, or just buy a new one.

When you were checking voltage at the headlight fuses, did you check to see if you had voltage at the relay?

Yes I have voltage at the relay. And the relay is brand new I just paid $20 for it. I have no idea if I can hear it I will test that tomorrow. It's been a long day of not getting my truck to turn over. Having an issue somewhere I just don't know where yet. Have spark and gas but doesn't want to start.


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