![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
|
![]() |
#1 |
Registered User
Join Date: Jun 2012
Location: Swoope, VA
Posts: 17
|
Hooking up reverse lights to a TH400
My truck is a combination of many different ones. It has a TH400 auto trans. The previous owner was just using a toggle switch to turn on the back-up lights.
Should this be hooked to a switch in the transmission or on the shifter? The transmission has a 1/4" male terminal on the drivers side down low. I assumed it was the switch I was looking for and since it only had 1 terminal it grounded it when reverse was selected. I connected my test light from the batt. pos. to this terminal but it's grounded no matter what gear the trans. is in. If this isn't the back-up light terminal where is it? Also, the truck will start in any gear; where's the park/neutral start switch located?
__________________
1987 S-10 Blazzer Sold, 1986 GMC Jimmy Sold, 2002 Chevy 2500 HD 2wd, 6.0, auto. Sold, 2007 Chevy 3500 SRW 4wd D/A Sold, 2005 Chevy 3500 4wd CC, D/A, dually, 2001 Chevy 3500 4wd EC, 8.1/A dually, 1969 Chevy C10 short bed, 307 V8 |
![]() |
![]() |
![]() |
#2 |
Senior Member
![]() Join Date: Oct 2010
Location: Cadiz, Ky
Posts: 512
|
Re: Hooking up reverse lights to a TH400
The neutral safety switch and reverse switch is made together on these trucks for automatic transmission. It is on the steering column down low toward the firewall. I found a decent pic on Post #14 of this thread. Hope this helps.
http://67-72chevytrucks.com/vboard/s...d.php?t=478107
__________________
1972 Chevy LWB Roadster 1999 Chevy Silverado 2wd 2015 Chevy High Country 4x4 Crew Cab Last edited by chiefcfd; 05-31-2014 at 09:07 PM. |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
|
Re: Hooking up reverse lights to a TH400
The trans connector is for the kick down solenoid. Its activated by a throttle mounted switch either on the engine or the throttle pedal inside on the later trucks. This needs to be active to assure proper trans pressures.
The reverse lamps are, as said, are activated by the column mounted NSS switch. Probably be a good idea to open up a factory manual and look at some wire schematics and trans service proceedures. * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
![]() |
![]() |
![]() |
Bookmarks |
|
|