72 engine bay harness
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,276
Likes: 337
From: "ɹǝpunuʍop", Adelaide, South Australia
72 engine bay harness
when the engine comes out soon i will be tiding up the original un-molested engine bay.
i have already bought a new engine harness to suit my 350 auto w/ac a few months ago for my spares box.
just having a look under there and it appears that i will need others...
is the alternator plugs/wiring part of the front lamp harness? or other?
there is a mass of uncovered orange/red wires going to the terminal/relay on the side by the alt, what harness are they from?
what about the ac wiring by the heater box?
only asking now cause it takes over a month to get order shipped down under,
and with xmas coming, who knows how long they will take.
i have already bought a new engine harness to suit my 350 auto w/ac a few months ago for my spares box.
just having a look under there and it appears that i will need others...
is the alternator plugs/wiring part of the front lamp harness? or other?
there is a mass of uncovered orange/red wires going to the terminal/relay on the side by the alt, what harness are they from?
what about the ac wiring by the heater box?
only asking now cause it takes over a month to get order shipped down under,
and with xmas coming, who knows how long they will take.
Team Owner
Joined: Sep 2006
Posts: 31,230
Likes: 4,323
From: Westminster Maryland
Hi rrau,
I can answer for the alternator connections... they're part of the engine/ignition harness.
It looks like the a/c harness is a separate harness in the engine compartment, and part of the dash harness in the interior.
Regards,
Alan
I can answer for the alternator connections... they're part of the engine/ignition harness.
It looks like the a/c harness is a separate harness in the engine compartment, and part of the dash harness in the interior.
Regards,
Alan
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
I always though that the alternator wiring was in the forward lamp harness.
That relay is your horn relay. The large gauge wires that are secured it to come from both harnesses and possible separate harness for A/C so it is getting 12 volt power. In these harnesses...there are often fusible links installed. The one form you A/C may have a separate fuse holder in it that holds a 30 amp fuse for your high speed blower fan operation. I am not at work where my wiring diagrams are located....so for EXACT clarification on these power circuits...hopefully someone will post a photo...or obtain a wiring diagram.
DUB
That relay is your horn relay. The large gauge wires that are secured it to come from both harnesses and possible separate harness for A/C so it is getting 12 volt power. In these harnesses...there are often fusible links installed. The one form you A/C may have a separate fuse holder in it that holds a 30 amp fuse for your high speed blower fan operation. I am not at work where my wiring diagrams are located....so for EXACT clarification on these power circuits...hopefully someone will post a photo...or obtain a wiring diagram.
DUB
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
The a/c harness is separated and does have a heavy orange wire that starts at the blower relay and leads to a inline fuse on the driver side. The wire that comes from the other side of the inline fuse is red that wire connects to the horn relay.
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,276
Likes: 337
From: "ɹǝpunuʍop", Adelaide, South Australia
will take a photo when i get home from work and post up to confirm the other wires to the horn relay
but it looks like i better buy the forward lamp harness aswell, ie: soon
if i do one harness, i mite aswell do the lot, dont want to have to go thru all this again
thanks guys
but it looks like i better buy the forward lamp harness aswell, ie: soon
if i do one harness, i mite aswell do the lot, dont want to have to go thru all this again
thanks guys
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,276
Likes: 337
From: "ɹǝpunuʍop", Adelaide, South Australia
hard to get in there properly to get a good photo
ignore the 2 heavy gauge red wires on the left, they are for the relays for the headlights and a extra power from the alternator
also this is on the firewall between the brake booster and the wiper motor, what is it?
looks like the ac harness does inside the cabin and the engine bay due to the large grommet on the wires
ignore the 2 heavy gauge red wires on the left, they are for the relays for the headlights and a extra power from the alternator
also this is on the firewall between the brake booster and the wiper motor, what is it?
looks like the ac harness does inside the cabin and the engine bay due to the large grommet on the wires
Last edited by riverracer au; Nov 6, 2013 at 06:49 AM.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
hard to get in there properly to get a good photo
ignore the 2 heavy gauge red wires on the left, they are for the relays for the headlights and a extra power from the alternator
also this is on the firewall between the brake booster and the wiper motor, what is it?
looks like the ac harness does inside the cabin and the engine bay due to the large grommet on the wires
ignore the 2 heavy gauge red wires on the left, they are for the relays for the headlights and a extra power from the alternator
also this is on the firewall between the brake booster and the wiper motor, what is it?
looks like the ac harness does inside the cabin and the engine bay due to the large grommet on the wires
The last photo is a 30 amp fuse for your power windows. Should be a red wire going to the horn relay and a orange (with black strip) going to the P/W relay in the console. Wiper relay is in the console as well.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
