L82 ‘75 Corvette
10-01-2018, 07:08 AM
#4
Team Owner
Member Since: Oct 2004
Location: altered state
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St. Jude Donor '05
proportioning valve Id bet for the "brakes"light on dash
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macka75 (10-03-2018)
10-01-2018, 09:01 AM
#5
Le Mans Master
The plug at the (not actually a proportioning valve but every one calls it that anyway) switch acts as a ground. If your brake light lights on your dash, that may be why it was disconnected. Please fix the root cause of the issue, not just the symptom. 
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macka75 (10-03-2018)
10-01-2018, 12:37 PM
#6
Tech Contributor
The 73-75 L82 vettes had a working cowl door hood, that might be the connector from the switch under the gas pedal. There would be a brown wire going down the hood up to the door. I had an original 75 L82 4 speed coupe but it's been a long time and it's long gone now.
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macka75 (10-03-2018)
10-01-2018, 01:17 PM
#7
Le Mans Master
Member Since: Aug 2006
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C3 of Year Finalist (appearance mods) 2019
The Brake light switch get only one TAN wire
The Air door connector has two wires TAN & BLACK
The Alarm connector has two wires PINK & ORANGE
'75 schematic:
https://docs.google.com/viewer?a=v&p...WRiNTdjNjdkNTQ
The Air door connector has two wires TAN & BLACK
The Alarm connector has two wires PINK & ORANGE
'75 schematic:
https://docs.google.com/viewer?a=v&p...WRiNTdjNjdkNTQ
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macka75 (10-03-2018)
The following 2 users liked this post by '75:
macka75 (10-03-2018),
Peterbuilt (10-03-2018)
10-01-2018, 10:32 PM
#9
Melting Slicks
I have a 75 L82 it’s hanging on mine too the alarm is switch is long gone. On another 75 yellow and brown goes below windshield washer reservoir. I’ll try to look it over a little closer tomorrow.
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macka75 (10-03-2018)
10-03-2018, 02:42 AM
#10
Intermediate
Thread Starter
L82 `75 Corvette
100% correct , it is just a pressure differential switch. Simple spool shifts with system pressure loss on one side or the other.
The 73-75 L82 vettes had a working cowl door hood, that might be the connector from the switch under the gas pedal. There would be a brown wire going down the hood up to the door. I had an original 75 L82 4 speed coupe but it's been a long time and it's long gone now.
The 73-75 L82 vettes had a working cowl door hood, that might be the connector from the switch under the gas pedal. There would be a brown wire going down the hood up to the door. I had an original 75 L82 4 speed coupe but it's been a long time and it's long gone now.
The following users liked this post:
macka75 (10-04-2018)
