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ACC Circuit Breaker

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Old May 6, 2011 | 09:05 AM
  #1  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
ACC Circuit Breaker

Does anyone know why the ACC circuit breaker for the Power door locks, Rear window defogger and Power seats gets hot. It gets so hot that I can not touch it without burning my fingers.
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Old May 6, 2011 | 08:42 PM
  #2  
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From: Ebenezer,Sakatchewan
Car: 82 Camaro Z28
Engine: 305
Transmission: auto
Re: ACC Circuit Breaker

all of the things you listed take alot of amperage. amperage(load) creates heat.

you must have girly hands if your getting burnt on that
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Old May 6, 2011 | 11:24 PM
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Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: ACC Circuit Breaker

That's cold man. Use an ampmeter, or better yet a Fuse Buddy, to test current load on the circuit. Make sure it doesn't go higher than the rating of the breaker. If it does, the breaker should trip.
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Old May 7, 2011 | 10:23 AM
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From: Ebenezer,Sakatchewan
Car: 82 Camaro Z28
Engine: 305
Transmission: auto
Re: ACC Circuit Breaker

just jokin with him a bit doc.

a little more info would be nice... Is it hot all the time? or just when using the seats, just using power locks, or all of them at once?
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Old May 8, 2011 | 02:01 PM
  #5  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Re: ACC Circuit Breaker

It is hot all the time. Not just when working the seats, rear defroster or power door locks. This things is hot all the time. Not sure what it is or what to start looking for. I need help pointing me in the right direction. Thanks
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Old May 8, 2011 | 03:28 PM
  #6  
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From: Ebenezer,Sakatchewan
Car: 82 Camaro Z28
Engine: 305
Transmission: auto
Re: ACC Circuit Breaker

Originally Posted by IROCU2
It is hot all the time. Not just when working the seats, rear defroster or power door locks. This things is hot all the time. Not sure what it is or what to start looking for. I need help pointing me in the right direction. Thanks
Is there anything in the acc. circuit that is not working or not working correctly?

your right when you think the breaker shouldn't be hot when nothing on that circuit is being used . time to use an amp meter, the draw could be pretty high so make sure the amp meter can read at least 30A.

if your worried about it change the breaker
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Old May 9, 2011 | 10:35 AM
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From: Aurora, OR
Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: ACC Circuit Breaker

It's possible the breaker could just be faulty. If it is not making good connection, the arcing of the contacts will produce heat.
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Old May 9, 2011 | 10:51 AM
  #8  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Re: ACC Circuit Breaker

I tried new breakers and I am having the same results. I guess its time to start unpluging things. How would I check with a amp meter?
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Old May 9, 2011 | 11:18 AM
  #9  
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From: Aurora, OR
Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: ACC Circuit Breaker

An ammeter has to be installed inline with the circuit. I use blade terminals to make test leads so that I can connect the ammeter between one side of the circuit breaker and its connection at the fuse panel. Then watch amperage while you disconnect and reconnect items on the circuit. For details on the ACC circuit, go to my "wiring diagrams thread on the Electronics forum and follow the link to eaglemark.comDIY EFI. We are compiling a huge diagram library there. I have recently up loaded fuse and breaker details for the 87.
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Old May 11, 2011 | 04:07 PM
  #10  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Re: ACC Circuit Breaker

Thanks. I will try that and get back with the results.
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Old May 11, 2011 | 04:09 PM
  #11  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Re: ACC Circuit Breaker

Thanks. I will try that.
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