Low Door Lock Voltage

Reply Subscribe

Thread Tools

Search this Thread

Oct 2, 2010 | 05:03 PM

6_Myles

Thread Starter

Tuned

Joined: Feb 2007

Posts: 331

Likes: 4

Low Door Lock Voltage

Been having problems with drivers side front & rear doors, as well as the rear window lock. They unlock just fine, but won't lock.

I did the tin-foil trick on all three and it didn't improve any of the three actuators. I took a voltage reading at the drivers door and it was virtually nothing on the lock and a good 12v on unlock.

Could a bad actuator be causing this or is it the VSM, or a bad ground? It just started out of the blue.

Oct 2, 2010 | 07:38 PM

perryg114

More Turbo

Joined: Jul 2010

Posts: 669

Likes: 7

From: Tennessee

Most likely it is a bad relay. There are actually three relays. All lock, all unlock, and driver unlock relays. So I expect your, all unlock relay, is bad. Most likely the extra current caused by shorting out the resistors in the door lock modules has caused the relay to fail. I don't know where the relay is. All I can tell you is follow the clicking noise.

Perry

Oct 3, 2010 | 08:43 PM

6_Myles

Thread Starter

Tuned

Joined: Feb 2007

Posts: 331

Likes: 4

I've got an 03 7.3L, and I've been reading that the Remote Door Lock is part of the Vehicle Security Module and it's behind the radio.

Can anyone confirm this? Thanks

Oct 3, 2010 | 08:51 PM

moto4

Freshman User

Joined: Feb 2009

Posts: 46

Likes: 1

Have you checked the voltage on the two that are working? It would seem strange that a relay would work for some, but not all.

Oct 3, 2010 | 09:58 PM

bgalaxy67

Elder User

Joined: Jan 2004

Posts: 763

Likes: 3

From: Rio Linda, Ca

How is the resistance in the ground circuit?

I found my ground wire worked it's way loose. It is on the drivers side behind the panel in the cargo area. It's closer to the second row shoulder harness.