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04-30-2013, 11:56 PM
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#1 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Brake Switch Wiring... Cool wiring pics!!!
Hey guys, its another Brake Switch wiring question.
Details - 77 c10, 5.3/4l60e swap. EZ21 wiring harness Park Lights come on, but no brake lights... Wiring pic using four prong switch, and some pics of my project... Orange Wire - Brake Switch Power White Wire- Brake Switch Red Wire - TCC wire PSI Harness Pink Wire - 12V to battery What am I doing wrong?
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-01-2013, 06:31 AM
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#2 |
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Registered User
Join Date: Mar 2000
Location: Clute, TX.
Posts: 1,933
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Re: Brake Switch Wiring... Cool wiring pics!!!
I wish my garage was that clean
Posted via Mobile Device
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2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe |
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05-01-2013, 09:48 AM
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#3 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,968
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Re: Brake Switch Wiring... Cool wiring pics!!!
If your harness matches the Original... The white wire from the brake pedal should go to the steering column harmonica connector. From there into the turnsignal switch. The turnsignal switch feeds the bright filaments of the 1157 bulbs in the tails when the white wire from the brake pedal is hot.
Do the rear hazards and turnsignals work?
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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. |
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05-01-2013, 12:22 PM
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#4 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
The EZ Harness is a Universal Harness, so it's not an exact match.
The white wire and orange both come out of the harmonica connector, the white was considerably longer than the orange....? Not sure about hazards, and my turn signal cam is broken, needs replaced. But when I turn the key, the right tail flashes, so I'm assuming the turn signals work...
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-01-2013, 02:29 PM
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#5 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
If you guys need more info, or better pics. Please let me know...
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-01-2013, 06:34 PM
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#6 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
Can I get a Mods help and have this moved over to the electrical section? Hoping I can get some help over there... my apologies guys.
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-01-2013, 10:12 PM
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#7 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: Brake Switch Wiring... Cool wiring pics!!!
Have you unplugged the orange and white wires from the switch and jumped them together to see if they work? Do you actually have power on the orange wire? Checked the fuses?
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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05-01-2013, 10:25 PM
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#8 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
I will jump them together... they are joined going into the plug on the column, if that helps. i'll check fuses too
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-02-2013, 12:00 AM
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#9 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
Thanks LS1nova... It was a blown fuse. Checked orange wire for power and nothing, fuse was toast. Got one brake light to work, the other doesn't work becasue my turn signal on that side is on and turn signal cam is broken, so need to replace that.... I'm hoping that is it. Posed my question in electrical so hopefully get some help there.
Thanks for your help fellas! 
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-02-2013, 09:09 AM
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#10 |
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Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,968
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Re: Brake Switch Wiring... Cool wiring pics!!!
Sounds like you fixed it. New AC Delco Turnsignal switches are still available.
If you look at the turnsignal switch detail in the 1977 GM wiring manual the pinout on the switch side of the harmonica will not be changed regardless of what harness you used.
__________________
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. |
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05-02-2013, 11:40 AM
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#11 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Brake Switch Wiring... Cool wiring pics!!!
Thanks hatzie!
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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