05' Electrical problems
Thread Starter
Intermediate
Joined: Nov 2005
Posts: 38
Likes: 0
05' Electrical problems
Need some help with determining the source of the problems with my 2005 Manual transmission Vette.
My Vette Dealership is at his wits end, and I'm hoping all the techs out in the forum can help.
The Vette itself, when parked and placed in reverse will shut down (engine off), but all remaining electronics remain on, and the cars diagnostics display reads "Place car in reverse" (Accept that the car is already in reverse) - and ultimately a dead battery.
The Vette tech first thought it was the battery (aftermarket) - no fix; swapped out the ECM and BCM - no fix; swapped out the Fuse Grid - No fix; they've run power through the fuses to try and determine where the drain may be (loose wire, cut wire or loose ground) - no fix.
Any other thoughts on what to try?
My Vette Dealership is at his wits end, and I'm hoping all the techs out in the forum can help.
The Vette itself, when parked and placed in reverse will shut down (engine off), but all remaining electronics remain on, and the cars diagnostics display reads "Place car in reverse" (Accept that the car is already in reverse) - and ultimately a dead battery.
The Vette tech first thought it was the battery (aftermarket) - no fix; swapped out the ECM and BCM - no fix; swapped out the Fuse Grid - No fix; they've run power through the fuses to try and determine where the drain may be (loose wire, cut wire or loose ground) - no fix.
Any other thoughts on what to try?
Race Director
Joined: Oct 2010
Posts: 14,475
Likes: 785
From: Las Vegas NV
There was a reflash for the computer so that it was no longer necessary to put it in reverse to shut down. Tell them to check on that. Aside from doing that it sounds to me like a microswitch or something in the shifter is not sensing when the shifter is in reverse.
Advanced
Joined: Nov 2013
Posts: 74
Likes: 2
From: Cypress Texas
It seems the ECM thinks the car is not in reverse. Do the reverse lights come on when the car is in reverse? I don't know if the ECM and the reverse lights use the same signal. Based on the display message it seems whatever tells the ECM the car is in reverse is not functioning.
Brighter minds than mine may be able to tell you how the ECM gets the signal from the trans.
Good luck
Brighter minds than mine may be able to tell you how the ECM gets the signal from the trans.
Good luck
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Check this but........one caveat before reading:
We never established what "switch" was replaced. It implies a simple "reverse light switch" but the text the OP wrote says "reverse INPUT switch". To me, that means the switch that's mounted on the '05 M6 trans, there are 2 of them, not the basic rev light switch most of us think of.
http://forums.corvetteforum.com/c6-c...ht-switch.html
We never established what "switch" was replaced. It implies a simple "reverse light switch" but the text the OP wrote says "reverse INPUT switch". To me, that means the switch that's mounted on the '05 M6 trans, there are 2 of them, not the basic rev light switch most of us think of.
http://forums.corvetteforum.com/c6-c...ht-switch.html
Thread Starter
Intermediate
Joined: Nov 2005
Posts: 38
Likes: 0
Thanks Rick T, I forwarded the information you'd provided onto the dealership that is "trying" to fix the Vette. They were not aware of this potential fix, and have ordered the identified parts.
Cautious optimism here, I'll keep you posted.
Cautious optimism here, I'll keep you posted.
5th Gear
Joined: Mar 2013
Posts: 5
Likes: 0
electrical problems
I went through the same problem with my 05. First the manual transmission has to be in reverse. There is a sensor that tells the computer the car is in reverse. If the sensor is bad, the computer stays up and will kil the battery in an hour. My chevy dealer told me they now have an upgrader sensor. I bought a new battery and a trickle charger. no problems now for a year
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
Check this but........one caveat before reading:
We never established what "switch" was replaced. It implies a simple "reverse light switch" but the text the OP wrote says "reverse INPUT switch". To me, that means the switch that's mounted on the '05 M6 trans, there are 2 of them, not the basic rev light switch most of us think of.
http://forums.corvetteforum.com/c6-c...ht-switch.html
We never established what "switch" was replaced. It implies a simple "reverse light switch" but the text the OP wrote says "reverse INPUT switch". To me, that means the switch that's mounted on the '05 M6 trans, there are 2 of them, not the basic rev light switch most of us think of.
http://forums.corvetteforum.com/c6-c...ht-switch.html
Somewhere there is a switch that tells the BCM that the car is in reverse...this is the first thing to check.
