1NSIGHT

iTrader: (3)

I believe I can officially say I have the worst luck ever.

I just fixed my oil leak and go to run the car and make sure its all good. The main power line I have running from my battery to my fuse boxe to run my Haltech, fuel pump, injectors, ignition goes up in smoke. Luckily I have a junction that runs from the battery to another wire that ends at the firewall so only 4 feet of wire burned up and not 10 feet. I have no idea why exactly it happened but im certainly not in good spirits about it.

These leads me to a question I asked in another thread that no one answered for me but could be a small link to why it happened. Why when I start my car the voltage reads low until I rev the engine til about 2400 rpm. I hear a relay go off and the alternator power kicks in?

1NSIGHT

iTrader: (3)

Pic of the wire



Some of the harness it burned



The junction in the middle that saved me thousands of dollars.

Molotovman

iTrader: (49)

Was the bolt for your "junction" loose or shorting out?

1NSIGHT

iTrader: (3)

Nope, not loose. Was well wrapped in electrical tape and had shrink wrap so no shorting.

Molotovman

iTrader: (49)

The ring terminals were just taped and heat shrieked together?

satch

iTrader: (1)

The alternator can self excite itself when reved. Normally speaking, the alternator should be excited when the engine is started. If you have an S4 alternator then the W/B wire should have very low voltage w/key to on and connected to the alternator, otherwise it would output 12 volts when unplugged. And the B/W wire supplies the switched 12 volts. If one of these wires is not operating properly then the alternator will not excite itself to begin with.

1NSIGHT

iTrader: (3)

There was a bolt to hold them together.

1NSIGHT

iTrader: (3)

Found cause. Main battery ground at the starter was loose.