Electrical harness from scratch?
11-19-16, 07:26 AM
#1
Electrical harness from scratch?
So recently rebuilt my engine, went to fire it up and long story short it started but the engine harness laid on the exhaust (DOH) and fried both the engine harness and the front chassis harness. I was curious if anyone has made a new, bare bones front chassis harness. I have a s4 n/a (my car is s5 though) engine harness which ive read can be used with a little work, but I cant find anyone to sell me or pull a front chassis harness to sell. My wiring skills are decent, but I'd like something to follow along with lol
11-19-16, 03:10 PM
#3
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i've done it, its a HUGE job, and unless you're changing the electrical system drastically; ie making it a race car. the benefits are small.
or to put it another way, unless you wanted to really change the switchgear, fuse box, stereo, pretty radically, then its not really worth the time.
the ECU/engine harness can be worth doing, as it is pretty well self contained, and when you upgrade ecu's you probably want to add more sensors
the charging harness is also a good candidate, as its small
or to put it another way, unless you wanted to really change the switchgear, fuse box, stereo, pretty radically, then its not really worth the time.
the ECU/engine harness can be worth doing, as it is pretty well self contained, and when you upgrade ecu's you probably want to add more sensors
the charging harness is also a good candidate, as its small
11-19-16, 11:16 PM
#4
i've done it, its a HUGE job, and unless you're changing the electrical system drastically; ie making it a race car. the benefits are small.
or to put it another way, unless you wanted to really change the switchgear, fuse box, stereo, pretty radically, then its not really worth the time.
the ECU/engine harness can be worth doing, as it is pretty well self contained, and when you upgrade ecu's you probably want to add more sensors
the charging harness is also a good candidate, as its small
or to put it another way, unless you wanted to really change the switchgear, fuse box, stereo, pretty radically, then its not really worth the time.
the ECU/engine harness can be worth doing, as it is pretty well self contained, and when you upgrade ecu's you probably want to add more sensors
the charging harness is also a good candidate, as its small
11-20-16, 10:04 AM
#5
Nothing really crosses over from the chassis to the engine harness.
The engine harness does contain the wiper wiring but that's the only chassis related circuit.
My experience with our harnesses is that with a few exceptions (like injector pigtails) the wires are actually fine, it's the tape and other looming materials that get crusty and break.
Spend the time to deloom it and your wires are probably quite usable.
You'll also find a lot of unused wires (like for all the accessories you may not have or plan to delete) but don't automatically decide to rip them out.
Some of those circuits (like the AAS) can be repurposed to your benefit (I mention the AAS because it pops up at all four strut towers and is an easy way to get power/signals from the bay into the cabin, using wiring that's already in place).
You may be surprised when you remove the front harness that the longest wire in the whole car is the power feed to the washer bottle pump.
Just a bit of trivia.
The engine harness does contain the wiper wiring but that's the only chassis related circuit.
My experience with our harnesses is that with a few exceptions (like injector pigtails) the wires are actually fine, it's the tape and other looming materials that get crusty and break.
Spend the time to deloom it and your wires are probably quite usable.
You'll also find a lot of unused wires (like for all the accessories you may not have or plan to delete) but don't automatically decide to rip them out.
Some of those circuits (like the AAS) can be repurposed to your benefit (I mention the AAS because it pops up at all four strut towers and is an easy way to get power/signals from the bay into the cabin, using wiring that's already in place).
You may be surprised when you remove the front harness that the longest wire in the whole car is the power feed to the washer bottle pump.
Just a bit of trivia.
11-22-16, 11:12 AM
#6
Nothing really crosses over from the chassis to the engine harness.
The engine harness does contain the wiper wiring but that's the only chassis related circuit.
My experience with our harnesses is that with a few exceptions (like injector pigtails) the wires are actually fine, it's the tape and other looming materials that get crusty and break.
Spend the time to deloom it and your wires are probably quite usable.
You'll also find a lot of unused wires (like for all the accessories you may not have or plan to delete) but don't automatically decide to rip them out.
Some of those circuits (like the AAS) can be repurposed to your benefit (I mention the AAS because it pops up at all four strut towers and is an easy way to get power/signals from the bay into the cabin, using wiring that's already in place).
You may be surprised when you remove the front harness that the longest wire in the whole car is the power feed to the washer bottle pump.
Just a bit of trivia.
The engine harness does contain the wiper wiring but that's the only chassis related circuit.
My experience with our harnesses is that with a few exceptions (like injector pigtails) the wires are actually fine, it's the tape and other looming materials that get crusty and break.
Spend the time to deloom it and your wires are probably quite usable.
You'll also find a lot of unused wires (like for all the accessories you may not have or plan to delete) but don't automatically decide to rip them out.
Some of those circuits (like the AAS) can be repurposed to your benefit (I mention the AAS because it pops up at all four strut towers and is an easy way to get power/signals from the bay into the cabin, using wiring that's already in place).
You may be surprised when you remove the front harness that the longest wire in the whole car is the power feed to the washer bottle pump.
Just a bit of trivia.
my options are either run all new wire and Repin everything or maybe get lucky and cut that section out and splice in wires. Either way it's going to be a lot of work lol.
