Electrical Help!!!

Reply Subscribe

Thread Tools

Search this Thread

Feb 13, 2012 | 08:39 PM

#16

GS4_Fiend

Lexus Test Driver

iTrader: (22)

Joined: Aug 2008

Posts: 7,409

Likes: 232

Quote:

Originally Posted by sam12345

Not sure if you can remove the light housing without removing the panel but you if you can disconnect the plug and check the voltage. Or check the voltage at the bent prongs. see if there is any. check the resistance to see if there is a short. (without bulb plugged in or power going to it)

how much resistance is consider a short?

Feb 13, 2012 | 08:46 PM

#17

sam12345

Lexus Champion

iTrader: (1)

Joined: Nov 2009

Posts: 2,037

Likes: 9

From: tx

Not sure what the upper limit is. But if you have it on the beep test and it beeps it would be a short. test without the bulb

Feb 13, 2012 | 10:29 PM

#18

GS4_Fiend

Lexus Test Driver

iTrader: (22)

Joined: Aug 2008

Posts: 7,409

Likes: 232

how can you define which side is shorted?

Feb 14, 2012 | 08:44 AM

#19

21SF

Thread Starter

Driver

iTrader: (1)

Joined: Jan 2012

Posts: 188

Likes: 0

From: ca

Well i got a multi meter and took the door panel off now i just need to figure out how to test the door ecu and the door lock sensor or whatever.

I just find it strange that all other door functions like windows and locks still work, isnt that what the door ecu does?

Feb 14, 2012 | 11:13 AM

#20

sam12345

Lexus Champion

iTrader: (1)

Joined: Nov 2009

Posts: 2,037

Likes: 9

From: tx

check the voltage at the plug that plugs into the light that is not working

If you have voltage at the plug then (with the plug still disconnected) check the resistance from the terminal to terminal on the light socket (the thing the plug plugs into that is on the door panel) Check it without the light bulb. Your resistance should be infinite ( a 1 blinking on most meters)

If you dont have voltage at the plug then check voltage at the fuse also check resistance across the fuse with fuse removed just to make sure it is good (this should be zero or near zero resistance)

Last edited by sam12345; Feb 14, 2012 at 11:17 AM.

Feb 14, 2012 | 11:17 AM

#21

21SF

Thread Starter

Driver

iTrader: (1)

Joined: Jan 2012

Posts: 188

Likes: 0

From: ca

I got frustrated and took it to Toyota. I absolutely suck at electrical....Hopefully its something simple that i over looked.. i just need them to tell what part/s are bad so i can order them from sewell.

Anyways thanks for your input, I really appreciate it. Ill keep this thread updated with the conclusion.

Feb 14, 2012 | 11:19 AM

#22

sam12345

Lexus Champion

iTrader: (1)

Joined: Nov 2009

Posts: 2,037

Likes: 9

From: tx

Yeah, this multiplex systems can be difficult without a scan gauge

Feb 15, 2012 | 08:46 AM

#23

21SF

Thread Starter

Driver

iTrader: (1)

Joined: Jan 2012

Posts: 188

Likes: 0

From: ca

So i turned out to be the door ECU. I guess a circuit inside is fried, the master tech jumped the input to the output ecternally and it works.

Trying to decide weather or not to replace it. 260 from Carson or 100 on ebay...