My park lights & tail lights stay on. I have replace my headlight switch?

Tiny
BIGAL2WIN
  • MEMBER
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 184,000 MILES
I sent a message the other day, my problem is? My park lights & tail lights stay on. I have replace my head light switch, brake switch. Some guy, told me to replace my light relay switch. Still the lights stay on.

please help.
Monday, February 23rd, 2009 AT 3:49 PM

8 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Now first off do you have a digital multi meter? Next what model of corolla do you have ie a LE, CE or what and look on the drivers door and let me know if it was Canadian made or? Get back to me and we will go from there. You may need to do some tests with the multi meter so if you can't or don't feel comfortable enough doing that let me know.
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Monday, February 23rd, 2009 AT 4:03 PM
Tiny
BIGAL2WIN
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Yes, I do have a multi-meter. I have a problem w/ the park lights and tail lights staying on. I have replaced the light switch, brake switch, and was told by one your guys to replace the light relay switch.

Yes I have a meter.
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Tuesday, February 24th, 2009 AT 1:31 PM
Tiny
RACEFAN966
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Ok best I can tell this is a canadian made toyota. I need to know if it has daytime running lights? Get back to me as the daytime relay box is what I would like test to see if it is bad. Thanks.
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Tuesday, February 24th, 2009 AT 8:37 PM
Tiny
BIGAL2WIN
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Yes it has daylight running lights. Thank you for getting back to me. So should I replace the daylight running switch or box? I will wait for reply.
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Tuesday, February 24th, 2009 AT 9:23 PM
Tiny
RACEFAN966
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No I do not want to just replace parts. Lets put you digital multi meter to work and do a couple of tests to make sure weather or not that is the problem ok. Now under the hood on the radiator support on the right (passanger) side there is a relay. This is the daytime running light relay. Let test this first. You need to check the power in this will be the red and white wire, this should be constant power if I am reading right. The red and black wire should be power when the key is on. If that is not true then it maybe the other way around the wiring diagram is not totally clear. Now your red and blue wire is power out. So if both the red and white as well as the red and black wire have power all the time then we need to look into the DRL Module. But if only one has power when the key is off but yet the red and blue wire is still sending power then we will need to unplug this relay and see if the light then turn off. If so then we will do a ohms test on the relay. This is a 4 term relay.
The ohms test will go as follows. So set you meter to ohms and check for continuity between term 1 (this is the where the red and blue wire connects to it) and term 3 (red and black wire). Then between term 1 and term 4 (red and white wire). If there is continuity between any of those then the relay has stuck closed and needs to be replaced. Get back to me and we check the DRL module next if that test good.
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Wednesday, February 25th, 2009 AT 10:57 AM
Tiny
BIGAL2WIN
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  • 7 POSTS
Hello, racefan966

I tested the power we have constant power to the red-white wire.

No power red -blk

constant power to red-blue

blk-blue has no power

unplug relay had lights

I also tested all relays switches their good even. Even the drl relay switch tested good
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Thursday, February 26th, 2009 AT 2:49 PM
Tiny
RACEFAN966
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Ok there is also a relay behind the glove box for the daytime running lights have you checked that one? If not then please do. The light green and black wire going to it should only have power when the key is in the on possition. Let me know what you find and we will go from there.
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-1
Friday, February 27th, 2009 AT 10:04 AM
Tiny
BIGAL2WIN
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  • 7 POSTS
Its was the tail light control relay but to be sure here is a guide to help test it and the location of the relay below.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know what happens.
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Saturday, February 28th, 2009 AT 10:26 AM

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