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Old Jun 9, 2023 | 08:53 AM
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Car is a '72 BB w/Manual trans & AC.. Center of car, vicinity of wiper motor I have this connector w/2 BLU & TAN wires. Does anyone recognize? I don't have assembly manual or FSM to consult. Also right side vicinity of blower motor is the orange wired connector with no home?
Any help would be appreciated.





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Old Jun 9, 2023 | 09:23 AM
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orange wire goes to the heater motor (usually with a noise suppressor inline)
the other one is the wiper washer connector NOPE, those are the TCS solenoid
M




Last edited by Mooser; Jun 10, 2023 at 10:18 AM.
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Old Jun 9, 2023 | 09:43 AM
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Originally Posted by Mooser
orange wire goes to the heater motor (usually with a noise suppressor inline)
the other one is the wiper washer connector
M
It was mentioned to me the blower motor is connected with PPL wire currently. So BLU/TAN to the washer pump? Pump is mounted to the container that's where in this car?
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Old Jun 9, 2023 | 09:54 AM
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Originally Posted by WVZR-1
It was mentioned to me the blower motor is connected with PPL wire currently. So BLU/TAN to the washer pump? Pump is mounted to the container that's where in this car?
The washer pump was built onto the wiper motor originally. It's possible someone removed it (there's not much room there to the air cleaner) The wires should be blue / yellow


If the car has A/C (looks like it does) then it's purple to the blower motor rather than the orange. I'm not sure what they did with the orange in that case, I would have thought it was cut off and tapped over but I don't have my wiring diagram here with me.

Just checked with my AIM and they did cut the orange wire plug off and discard it when A/C was installed. Maybe you are working with an aftermarket wiring or something that was changed after. Tape it off and ignore it at this point

M

Last edited by Mooser; Jun 10, 2023 at 10:17 AM. Reason: completely looking at the wrong thing
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Old Jun 9, 2023 | 10:01 AM
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That information and snapshots are appreciated. I'll pass those on to him and we'll se what happens! Thanks!

Do you do the F1 race in Montreal?
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Old Jun 9, 2023 | 10:02 AM
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There's only one place I remember that rubber fitting to be on my '72 A/C sbc and I think it was related to the blower, can't be sure though.
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Old Jun 9, 2023 | 10:13 AM
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Originally Posted by WVZR-1
That information and snapshots are appreciated. I'll pass those on to him and we'll se what happens! Thanks!

Do you do the F1 race in Montreal?
Not for a lot of years. Haven't even made it to the Toronto one and that's close by
M
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Old Jun 9, 2023 | 11:18 AM
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The cover in post #4 doesn't appear to be maybe original for a '72? I haven't seen the car but I thought a C3 cover used maybe a somewhat different cver just because of limitations.
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Old Jun 9, 2023 | 12:14 PM
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Originally Posted by WVZR-1
The cover in post #4 doesn't appear to be maybe original for a '72? I haven't seen the car but I thought a C3 cover used maybe a somewhat different cver just because of limitations.
My '72 wiper motor uses barrel connectors coming into the switch at 180° apart -- and just a single blue and single yellow for each. I'm thinking that blue/tan connector is something to do with the TCS system but haven't ventured out to my car to take a look.
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Old Jun 9, 2023 | 12:49 PM
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Originally Posted by 67:72
My '72 wiper motor uses barrel connectors coming into the switch at 180° apart -- and just a single blue and single yellow for each. I'm thinking that blue/tan connector is something to do with the TCS system but haven't ventured out to my car to take a look.

This is maybe more to what I was expecting!!! If/when you wander towards the car take a 'look/see' if you don't mind!

-Thanks All!
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Old Jun 9, 2023 | 01:28 PM
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The aftermarket harnesses have both the orange and purple wires for the fan. If you have a/c, the Orange can be removed or otherwise stashed away.

My ‘71 has a similar cover to yours on the wiper motor, but like so many other 50+ year old cars, I don’t know if it’s original any more.
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Old Jun 9, 2023 | 01:35 PM
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Originally Posted by WVZR-1
The cover in post #4 doesn't appear to be maybe original for a '72? I haven't seen the car but I thought a C3 cover used maybe a somewhat different cver just because of limitations.
Originally Posted by 67:72
My '72 wiper motor uses barrel connectors coming into the switch at 180° apart -- and just a single blue and single yellow for each. I'm thinking that blue/tan connector is something to do with the TCS system but haven't ventured out to my car to take a look.
The earlier 72 had the barrel connectors (like the 71 and before) and the later had the spade style connector as you've pictured. That picture is from my 72 which had the original harness at that point
M
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Old Jun 10, 2023 | 09:14 AM
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So for this 1972 BB w/AC & 4 speed I believe these are likely correct TCS parts. I'd be interested to know how they're wired 'originally'?

1} 3996297 - Controlled Vacuum Advance Delay Relay

2} 3996286 - Controlled Spark Switch

I didn't see a Spark Control Solenoid for the BB but there's one listed for 350 SBC.

I stumbled upon this NCRS Bulletin for the '73 & '74. Is there similar for maybe the '72? There's a 'Parts Chart' at the end of this bulletin.

https://www.corvetteforum.com/forums...973-74_tcs.pdf
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Old Jun 10, 2023 | 10:17 AM
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Now that I can actually look at a wiring diagram and not trying to look at a phone screen I see that I made a mistake on the colors there, that double wire blue and tan connector might be for the tcs on a manual transmission car (auto were different)
see if this helps





https://www.corvetteforum.com/forums...post1583985957




The tan wires go to one side of the TCS connector and the other side has the blue wires that go to the delay relay. That was not on the LS5 and they just had a jumper installed bypassing the delay timer




M
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Old Jun 11, 2023 | 12:29 AM
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Originally Posted by Mooser
The earlier 72 had the barrel connectors (like the 71 and before) and the later had the spade style connector as you've pictured. That picture is from my 72 which had the original harness at that point
M
How late is your '72? Mine is a May built car and has the barrel connectors. My original and the LectricLimited harnesses both have them.
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Old Jun 11, 2023 | 12:34 AM
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Originally Posted by Mooser
That was not on the LS5 and they just had a jumper installed bypassing the delay timer




M
Just to help someone searching for the delay relay (and shorting bar): they're behind the driver-side dash.
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Old Jun 11, 2023 | 07:31 AM
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Originally Posted by Mooser
The washer pump was built onto the wiper motor originally. It's possible someone removed it (there's not much room there to the air cleaner) The wires should be blue / yellow


If the car has A/C (looks like it does) then it's purple to the blower motor rather than the orange. I'm not sure what they did with the orange in that case, I would have thought it was cut off and tapped over but I don't have my wiring diagram here with me.

Just checked with my AIM and they did cut the orange wire plug off and discard it when A/C was installed. Maybe you are working with an aftermarket wiring or something that was changed after. Tape it off and ignore it at this point

M
Orange wire, that's FANTASTIC! I have been curious about that wire in like, forever, thanks!
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Old Jun 11, 2023 | 09:47 AM
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Originally Posted by 67:72
How late is your '72? Mine is a May built car and has the barrel connectors. My original and the LectricLimited harnesses both have them.
Mines a late May build. AFAIK it is (was) the original wiring harness, there were no splices in the line to the plug but it's possible someone changed it at the terminals at some point in time.



I've put an electric pump down at the tank so I could go find the original plug I guess
M

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