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Thread Tools | Display Modes |
05-27-2014, 08:23 PM
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#1 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Black wire to trans, what is this?
What is this black wire to the trans for, it's a three on the tree 1972 Custom/10 with a 250 i6
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05-27-2014, 08:24 PM
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#2 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
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05-27-2014, 08:25 PM
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#3 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
It goes to here,
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05-27-2014, 09:26 PM
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#4 |
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425hp409
 
Join Date: Oct 2008
Location: Prosper Texas
Posts: 841
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Re: Black wire to trans, what is this?
It should be for the backup light switch.
__________________
Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette |
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05-27-2014, 10:47 PM
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#5 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
Ok thanks 425HP409 ill go out tomarrow and pull that plug and see if the backup lights stop working.
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05-27-2014, 10:57 PM
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#6 | |
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Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,362
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Re: Black wire to trans, what is this?
Quote:
The backup light switch for the 3 on the tree is located on the steering column and has 2 wires (light & dark green). |
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05-28-2014, 12:22 PM
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#7 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
Yea maybe that is a TCS relay in the second picture. All I have seen before are inside the cab above the horn relay though, not here.
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05-28-2014, 01:39 PM
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#8 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,707
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Re: Black wire to trans, what is this?
The switch on the tranny that the black wire hooks to is the ground switch.
When you shift to third a lobe on the shifter shaft contacts the switch and the tcs is grounded thru the tranny. |
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05-28-2014, 01:46 PM
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#9 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
I'm gonna see if I can find a wiring diagram for TCS. Maybe I can fix it. Right now the blue and brown/white wire are hooked up to nothing.
Last edited by Custom/Ten; 05-28-2014 at 01:58 PM. |
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05-28-2014, 01:58 PM
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#10 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,707
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Re: Black wire to trans, what is this?
Do what ever you like. Hooked up hurts nothing. No power to the relay so you don't need it grounded. It's all just along for the ride.
You can't remove that switch on the tranny though. IIRC it's an odd ball thread size so a normal plug won't fit. |
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05-28-2014, 02:00 PM
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#11 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
Ok thanks geezer
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05-28-2014, 07:48 PM
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#12 |
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Registered User
Join Date: May 2014
Location: Mobile, AL
Posts: 422
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Re: Black wire to trans, what is this?
Yea, it's definitely the wire for the TCS sensor. I like a clean look so i removed the wires and relay and got rid of everything but the sensor and the black cap on it. Then I spent an hour cleaning the trans lol. Thanks for everyone's help!
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