LX450 Electrical Problem?

[gslam20]

Hey all,

Hoping for some trouble shooting assistance.

1997 LX450 w/ Slee headlight harness upgrade

Current issue:

Noticed the drivers side door courtesy switch was no longer working and I had the door open light on dash. Ordered a new switch and installed. Same problem. I disconnected the passenger courtesy switch and the drivers side now works. If the drivers side is disconnected the passenger side works. I also just realized that my passenger side headlight is out. When I swap the bulb to the drivers side, the bulb still works so its not the bulb. Both headlight fuses are functional. When I swap the new courtesy switch to the passenger side, I have the same outcomes as above.

Any thoughts or guidance that can be provided would be much appreciated.

Thanks!
Chris

 

[gslam20]

Bump

 

[Njck22]

Turn headlights on and check for 12v at the headlight socket that is out and should be on. . If 12v is not there then it sounds like a relay on the slee harness is fried.

 

[Njck22]

When both courtesy switches are out, headlight warning on the dash goes off right? check for continuity between the two courtesy switch harness connectors. should not be there.

 

[gslam20]

Yes, I just verified that when I disconnect both courtesy switches the dash light goes out. Looks like I need to buy a multimeter and do some checking. What would cause this to occur and how would it be fixed? Electrical is not a strong suit for me.

 

[Njck22]

it could be a short in a broken wire somewhere, or bad diode that normally isolates the courtesy switches. do this test, connect both courtesy switches. close your passenger door, close your driver door, dash light is on, right? if so then one of the switches is still bad.
if the dash light is out, then try this, get into the passenger seat. all doors closed. insert key. turn car on, turn key off but don't take it out. open the passenger door. does the buzzer go off?

 

[gslam20]

Thanks for the help. So the drivers side doors switch is brand new(genuine toyota part). While the passenger switch is disconnected and the drivers switch is connected, the drivers side door switch works perfectly. If I reconnect the passenger side it stops working. If I swap the new switches I get the same result which makes me think its the continuity issue you had mentioned. I did the test you asked above and the light did not go out.