Attention L69 Owners
04-28-2008, 01:41 PM
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Car: 1969 Z/28, 1983 Z/28
Engine: 350, 305 (L69)
Transmission: TKO-600, T5
Axle/Gears: 3.42, 3.73
Attention L69 Owners
I have an issue that I believe applies only to 83 and 84 L69's with AC. I ordered my 83 L69 without AC. I just finished installing a complete factory AC system from a donor 83, non-L69 car.
My problem is that the compressor wiring on other engines are different from an L69 and since they don't have electric fans, I also want to control the electric radiator fan to the L69 factory specifications. I could rig it to work, but I want it to appear OEM.
I have two connectors located between the evaporator housing and the distributor. One terminal is hot when the AC is on. Another operates the fan when grounded. I am guessing that between those two terminals and the other terminals, they control the compressor and the fan.
Does anybody have an L69 w/AC that could shed some light on what these connectors connect to? Since the L69 had a late intro in 83, my 83 service manual doesn't cover these differences in the wiring diagrams. Maybe a page or two from an 84 service manual AC wiring diagram might do the trick.
Thanks!
Larry
My problem is that the compressor wiring on other engines are different from an L69 and since they don't have electric fans, I also want to control the electric radiator fan to the L69 factory specifications. I could rig it to work, but I want it to appear OEM.
I have two connectors located between the evaporator housing and the distributor. One terminal is hot when the AC is on. Another operates the fan when grounded. I am guessing that between those two terminals and the other terminals, they control the compressor and the fan.
Does anybody have an L69 w/AC that could shed some light on what these connectors connect to? Since the L69 had a late intro in 83, my 83 service manual doesn't cover these differences in the wiring diagrams. Maybe a page or two from an 84 service manual AC wiring diagram might do the trick.
Thanks!
Larry
04-28-2008, 02:54 PM
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Re: Attention L69 Owners
I can't give you the exact information you are looking for, but I can give you this information:
the connector that is 'hot' with the AC on should be a green wire, and this would be the compressor clutch 'request' signal. this typically goes to the compressor clutch, along with a black wire to GND, and in most apps, also had a diode installed at the connector. This would just be a harness that has these two wires. the clutch gnd wire typically tied into the main splice in the harness, but I suppose in some cases, with '83 being early, some had just a short wire that had a ring terminal to the compressor bracket.
the fan wire would be the ground side of a relay, but I don't know where that relay would be located. The later cars had the relay located on the core support, between the battery and radiator on the passenger side. The reason is that the fan wires were heavy and run directly from the battery, this made the harness pretty short.
even if you don't make it look oem where it mounts, just use fresh black wire looming and black tape and it will look fine.
the connector that is 'hot' with the AC on should be a green wire, and this would be the compressor clutch 'request' signal. this typically goes to the compressor clutch, along with a black wire to GND, and in most apps, also had a diode installed at the connector. This would just be a harness that has these two wires. the clutch gnd wire typically tied into the main splice in the harness, but I suppose in some cases, with '83 being early, some had just a short wire that had a ring terminal to the compressor bracket.
the fan wire would be the ground side of a relay, but I don't know where that relay would be located. The later cars had the relay located on the core support, between the battery and radiator on the passenger side. The reason is that the fan wires were heavy and run directly from the battery, this made the harness pretty short.
even if you don't make it look oem where it mounts, just use fresh black wire looming and black tape and it will look fine.
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