Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
03-03-2016, 02:09 AM | #1 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
I need some assistance under dash around column
I pulled my column out and pedal assembly out and now I have 3 things I can't remember where they go. I'm up the creek without a paddle.
1. There's a rubber line (vacuum line?) that I obviously disconnected and can't remember where it went. It had to have been attached to the column or iny way at some point if I pulled it loose. Any ideas where it goes? 2. There is a black 2 wire connector with orange & white wire running to it. I'm assuming it goes to the brake light switch? But I also have a white/clear 2 wire plug with a purple & pink wire also under the dash hanging just right of where column sat. I need help getting these things back where they belong. Any help is greatly appreciated. First pic shows the rubber hose. 2nd pic shows the pink & purple wired plug and 3rd pic shows the orange & whote wired plug. Thanks
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-03-2016, 07:21 AM | #2 |
Senior Member
Join Date: Jun 2015
Location: Atlanta, GA.
Posts: 737
|
Re: I need some assistance under dash around column
I think they all go to the brake light switch. 1 for brake lights, 1 for cruise control/lock up TQ. Rubber line bleeds vaccuum off curise control when brake is applied. Check the column. GM keyed their plugs so assembly line works could not mix them up. Should work in your favor too.
__________________
Jay Gesner Atlanta, GA 1985 C10 Long Bed 4X2 LS 5.3, 4L60E Father/Daughter Project |
03-03-2016, 08:30 AM | #3 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
Well I figured out through wiring diagram that the orange & white wire plug goes to brake light switch. I already have the other plug for cruise control hooked up to brake light switch. So that still leaves me with the 2 wire plug with purple & pink wires. I am so confused because I know I disconnected the plug from somewhere but can't find any place to plug it back in.
As for the rubber line where does it attach? I'm almost sure I pulled it loose from something but can't find it either. Geez! This is frustrating because I usually don't have these kinds of problems when I work on things
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-03-2016, 08:36 AM | #4 |
Junior Member
Join Date: Jun 2004
Location: Murfreesboro, Tn
Posts: 1,092
|
Re: I need some assistance under dash around column
Did ya convert this to a manual trans?
I did this to my old 91 crew cab, I had to clean up po's wiring messes from add ons under dash. time consuming!!
__________________
1969 impala conv 427 #s loaded. dad bought new 1969 "Judge" RA-3, rare warwick blue/white, #'s 1968 vet convertible #s 427/435 tripower (sold) 1968 belair 2door post #s 427/385 1936 ford 5w coupe dads 1st car 1969 camaro ss (17,xxx) miles Wanted: 69-72 suburban project, 69 camaro convertible. also any big block cars. 69-70 gto judge project. |
03-03-2016, 08:41 AM | #5 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
I am in the process of converting it to a manual right now. I swapped out the pedal assembly. The problem is I know I unplugged the dang thing but can't find where to plug it back in. Im reinstalling the same column so it must not go to the column itself becasue I can't see any spots left to plug anything into
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-03-2016, 11:14 AM | #6 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
Ok I found out where the rubber vac hose ran to. Now I just need to determine where the 2 wire plug goes with the pink & purple wires
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-03-2016, 02:23 PM | #7 | |
Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,950
|
Re: I need some assistance under dash around column
Quote:
Read any numbers on that black module and look em up online. If you can determine what it is you can dig through the wiring diagrams to find what color wires are supposed to be plugged into it.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
|
03-03-2016, 02:34 PM | #8 | |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
Quote:
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
|
03-03-2016, 08:26 PM | #9 |
Registered User
Join Date: Dec 2014
Location: Northern California
Posts: 422
|
Re: I need some assistance under dash around column
Could it for be a neutral safety switch? Was the truck always an auto?
|
03-03-2016, 08:42 PM | #10 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
Truck was always an auto. After some info from another member we believe it is for the cruise control. I will check when I get home from work late tonight.
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-04-2016, 12:34 AM | #11 | |
Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,950
|
Re: I need some assistance under dash around column
Quote:
I was partly correct. That's a pedal switch type plug and it's not cruise control. First. Cruise control... Look at Page 309 of the 1988 wiring diagrams PDF for K34 Cruise control. Since this was an Automatic truck there's only one cruise plug to the brake switch. It's already plugged in. It's got two wires. Gray and Gray with a Black stripe. The Cruise Control cutout switch arrangement on a factory manual truck uses two pedal switches in series. The clutch switch would have the Gray with Black stripe wire that's in your brake switch plug and a short Brown wire from the brake switch position now occupied by your striped wire to the 2nd clutch switch plug cavity. I'd do it the same way. Now for what that plug is... BTW you no longer need it for its' original purpose. Your truck originally had the MD8 TH700R4 transmission... Look on Page 294 of the 1988 wiring diagrams. TCC cutout control wiring to a brake pedal switch, for the MD8 transmission only, uses that connector with Purple and Pink wires. Pink is Circuit 39 so it's hot with the ignition on. Purple is Circuit 420 to the TCC wiring plug on the TH700R4 that you no-doubt cut off the bulkhead plug in the engine bay. You can repurpose the connector shell from the Purple and Pink wires for your clutch cutout switch for the cruise control or the clutch starter interlock switch. Be darn sure to use some heat shrink that completely covers over the Pink wire terminal so it doesn't short and raise Cain with the electrical. The purple wire goes to the bulkhead plug but there's nothing on the outside now. Whatever that Scotchlok is for on the brake pedal switch white wire... get rid of it and tap into the wire the right way.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. Last edited by hatzie; 03-04-2016 at 12:57 AM. |
|
03-04-2016, 01:16 AM | #12 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
|
Re: I need some assistance under dash around column
Hotzie your a wealth of info. Thank you. But.....my truck was a factory TH400. After further research on my end I am almost sure this plug was unused and tucked up above my factory auto pedal assembly. I could be wrong but another member just checked his '88 like mine and he to found this same plug unused high above his brake pedal
__________________
88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205 |
03-04-2016, 01:23 AM | #13 | |
Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,950
|
Re: I need some assistance under dash around column
Quote:
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
|
Bookmarks |
Thread Tools | |
Display Modes | |
|
|