« previous next »
Pages: 1 [2]   Go Down

Author Topic: another round of what are these wires?  (Read 14735 times)

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6454
Re: another round of what are these wires?
« Reply #15 on: November 02, 2012, 08:46:17 PM »
Quote from: kmanrsss on October 21, 2012, 05:21:37 PM
got one more that ive got no clue on. It's orange and comes out of the wiring harness directly below where the throttle cable passes through the firewall....

Kmanrsss, have you puzzled this out yet? 

That orange wire might be used for the kickdown circuit on a TH400 transmission.  If it is, it should pass through the firewall to a 2- or 3-wire connector inside the cab that either plugs onto a slide switch that is operated by the accelerator pedal bellcrank, or to a relay.
« Last Edit: November 02, 2012, 09:08:46 PM by bd »
Logged
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline kmanrsss

  • Newbie
  • Posts: 67
  • Newbie
Re: another round of what are these wires?
« Reply #16 on: November 02, 2012, 08:48:26 PM »
Sorry I haven't gotten any more pics recently. I work for the local utility and have been working 17hr days since Tuesday. I'll get some pics tomorrow.
Logged

Offline kmanrsss

  • Newbie
  • Posts: 67
  • Newbie
Re: another round of what are these wires?
« Reply #17 on: November 09, 2012, 04:17:05 PM »
here we go. Any ideas? thanks
Logged

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18375
    • http://www.73-87chevytrucks.com
Re: another round of what are these wires?
« Reply #18 on: November 15, 2012, 06:49:28 PM »
The one coiled up looks like the proportioning valve or the oil pressure...  Which harness connector does it go to?
Logged

Offline 87454westernhauler

  • Frequent Member
  • **
  • Posts: 453
Re: another round of what are these wires?
« Reply #19 on: November 15, 2012, 09:42:26 PM »
could that wire be for a factory tach?
Logged
86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350

Offline pholliday1

  • Junior Member
  • ***
  • Posts: 632
  • 1990 V3500 Crew Cab
Re: another round of what are these wires?
« Reply #20 on: November 16, 2012, 08:53:09 AM »
i'm with capt it looks alot brake proportion valve wire. I would locate brake proportion valve ( on cross member between frame rails) and trace it back
Logged
VETERAN AND LIFETIME NRA MEMBER. WHAT DO YOU STAND FOR?
1991 V3500 CREWCAB SRW 454TBI GMC
1991 v3500 crewcab SRW 454tbi 480le 6" lift
1990 V3500 crewcab Dana 60 FF 14b 5:38 ratio 40 inch 11" lift
1989 v3500 crewcab 454TBI 5" lift

Offline kmanrsss

  • Newbie
  • Posts: 67
  • Newbie
Re: another round of what are these wires?
« Reply #21 on: November 20, 2012, 05:23:13 PM »
I also thought brake prop. Valve, but I've got a wire connected there already. Doesn't mean it's correct. Hopefully I'll have some time this weekend to finally look into it.
Logged

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6454
Re: another round of what are these wires?
« Reply #22 on: November 20, 2012, 06:27:25 PM »
Quote from: pholliday1 on November 16, 2012, 08:53:09 AM
i'm with capt it looks alot brake proportion valve wire. I would locate brake proportion valve ( on cross member between frame rails) and trace it back
Quote from: kmanrsss on November 20, 2012, 05:23:13 PM
I also thought brake prop. Valve, but I've got a wire connected there already. Doesn't mean it's correct. Hopefully I'll have some time this weekend to finally look into it.

The 87 brake combination valve is tan/white stripe....
Logged
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline kmanrsss

  • Newbie
  • Posts: 67
  • Newbie
Re: another round of what are these wires?
« Reply #23 on: November 21, 2012, 04:16:08 PM »
Just checked and I have a tan/white wire at the prop valve. This wire isn't labeled so it was most likely disconnected before I started.
Logged

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18375
    • http://www.73-87chevytrucks.com
Re: another round of what are these wires?
« Reply #24 on: December 03, 2012, 10:05:50 PM »
Could be the oil sensor, there is 2 on a 87.
Logged

Offline kmanrsss

  • Newbie
  • Posts: 67
  • Newbie
Re: another round of what are these wires?
« Reply #25 on: January 08, 2013, 03:33:36 PM »
I think I figured it out. While under the truck last night pondering the best way to remove my Transmission I found a bare connector on the DS of the Trany. Looks like it was for the kick down actuation. I guess I'm a dummy. I was positive I checked everything on that transmission. O well one less connection to lift while removing it.
Logged
Pages: 1 [2]   Go Up
« previous next »