Electrical help please!!!!
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
Let me go and check it again. With the Ohm Meter set at 200K, I got an O.L from battery terminal+ to the BAT cable. I got .01 from the terminal+ to the red wire and .00 at the brown wire with the key in the off position. With the key in the on position I got .07.
Let me go out and check it again at 200 on the Ohm Meter and see what I get and also verify what I had before.
Let me go out and check it again at 200 on the Ohm Meter and see what I get and also verify what I had before.
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
Brown being zero with the ign off Im thinking youre reading open circuit. When you connect your leads together and take them apart a few times you can recognize open circuit vs 0 ohms. If you get 38 ohms with the ign on youve got some bad contacts, you should get around 10 ohms. Read from the red wire to the brown wire.
Last edited by ToniJ1960; Sep 29, 2015 at 04:34 PM.
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
Dont use 200k range it will only resolve to 100 ohms if its 3.5 digits. You want to use a 200 or at worst 2000 ohm range. Two hundred ohms full scale you can resolve to .1 ohm.
Brown being zero with the ign off Im thinking youre reading open circuit. When you connect your leads together and take them apart a few times you can recognize open circuit vs 0 ohms. If you get 38 ohms with the ign on youve got some bad contacts, you should get around 10 ohms. Read from the red wire to the brown wire.
Brown being zero with the ign off Im thinking youre reading open circuit. When you connect your leads together and take them apart a few times you can recognize open circuit vs 0 ohms. If you get 38 ohms with the ign on youve got some bad contacts, you should get around 10 ohms. Read from the red wire to the brown wire.
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
Dont use 200k range it will only resolve to 100 ohms if its 3.5 digits. You want to use a 200 or at worst 2000 ohm range. Two hundred ohms full scale you can resolve to .1 ohm.
Brown being zero with the ign off Im thinking youre reading open circuit. When you connect your leads together and take them apart a few times you can recognize open circuit vs 0 ohms. If you get 38 ohms with the ign on youve got some bad contacts, you should get around 10 ohms. Read from the red wire to the brown wire.
Brown being zero with the ign off Im thinking youre reading open circuit. When you connect your leads together and take them apart a few times you can recognize open circuit vs 0 ohms. If you get 38 ohms with the ign on youve got some bad contacts, you should get around 10 ohms. Read from the red wire to the brown wire.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The voltage on the brown wire comes from the ignition switch. On my car it goes through a 510 ohm resistor, but I know on later cars it goes through the battery light bulb on the DIC.
Last edited by Cliff Harris; Oct 4, 2015 at 12:07 AM.
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
I hooked up the new alternator today minus the brown wire and it's still only cranking out 12volts. Shouldn't it still be cranking out 13.5? And yes Cliff, I believe inside the car it's a brown/white resistance wire. What I want to know is where does that wire go from start to finish?
Hey just out of curiosity and yes I know this is not a "fix" per se but a solution to the problem. How about going old school and converting this 3-wire alt to a 1-wire alt? Wouldn't it be a solution to the problem?
Hey just out of curiosity and yes I know this is not a "fix" per se but a solution to the problem. How about going old school and converting this 3-wire alt to a 1-wire alt? Wouldn't it be a solution to the problem?
Last edited by Guro305; Oct 4, 2015 at 02:53 AM.
Burning Brakes
Joined: Jul 2013
Posts: 1,027
Likes: 30
From: Granite City Illinois
I hooked up the new alternator today minus the brown wire and it's still only cranking out 12volts. Shouldn't it still be cranking out 13.5? And yes Cliff, I believe inside the car it's a brown/white resistance wire. What I want to know is where does that wire go from start to finish?
Hey just out of curiosity and yes I know this is not a "fix" per se but a solution to the problem. How about going old school and converting this 3-wire alt to a 1-wire alt? Wouldn't it be a solution to the problem?
Hey just out of curiosity and yes I know this is not a "fix" per se but a solution to the problem. How about going old school and converting this 3-wire alt to a 1-wire alt? Wouldn't it be a solution to the problem?
Take all the connections off at the starter solenoid and clean and inspect them. Have you noticed any issues with your ign switch?
Last edited by ToniJ1960; Oct 4, 2015 at 02:17 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Thread Starter
Instructor
Joined: Jul 2006
Posts: 174
Likes: 4
From: West Palm Beach Fl
I don't think its a god idea really. The alt you have has the voltage regulator built in to it. With all the electronics the Corvette has you better have a regulator.
Take all the connections off at the starter solenoid and clean and inspect them. Have you noticed any issues with your ign switch?
Take all the connections off at the starter solenoid and clean and inspect them. Have you noticed any issues with your ign switch?
How do you wire the one-wire alt? I know the red wire goes to the BAT does the brown wire go anywhere? I've read a couple different posts about it where some just tape it up and leave it and others attach a diode to the end of it.
Last edited by Guro305; Oct 5, 2015 at 02:39 AM.