66 327/300 convertible with factory AC wiring question

[John H.]

Re: 66 327/300 convertible with factory AC wiring question

[QUOTE=Jim Schwering (9598);744989]

The '65 and '66 A.I.M. sheets don't show that red power wire (except on the A/C wiring diagram page), but it DOES show in the '67 A.I.M., in section C60, on sheet E1; View "C" specifically shows the connection to the horn relay, and the main illustration clearly shows the wire (item #1) routed from the blower relay on one side, across the cowl, and forward on the driver's side of the engine compartment to the horn relay.[/QUOTe

John,

Thanks for the response.

We must be talking about another red wire then because this one would never make it . As Gene stated in the start of this post " it comes out of the wiring harness about 6-8" from the coil on the passenger side" . I have enclosed photo #1 . He goes on to say " After it exits the harness, there is about 3' of wire with a large eyelet at the end ". I enclose Photo #2 .

This same wire along with a long black wire that also has a large eyelet and comes out of the same place in the A/C harness ,as you can also see in photo #1 , had me wondering, and I posted the same question on this forum a while back. I think I requested some photos of wired starters as I assumed it went to there , but couldn't find anywhere in the AIM to tell me that . I did get some great photos of wired starters , but none with my extra red and black wires in them . So since I never did get an answer , I finally called M&H and they told me they went to the starter so I put them there . I still couldn't find anything in the AIM that confirms that placement , but I know it would never make it to the Horn Relay . Not even in a straight line across the engine !

So all new facts in hand , what do you think now ?

Jim

Jim -

The confusion here is that we're talking about two totally unrelated items. The big red wire with the in-line fuseholder that's all by itself, feeding the A/C high blower relay from the horn relay that runs across the cowl and down the driver's side of the engine compartment is an add-on wire used only on A/C cars.

The wires in the photos you posted are part of the standard engine harness, and have nothing to do with the A/C system - they're on every car, regardless of how it's optioned. Their connections are shown in your Assembly Manual in UPC 12, sheet A9, View "B". The purple wire goes on the inboard small starter solenoid "S" terminal, the pink wire goes on the outboard small "R" terminal; the positive battery cable, 20-ga. black battery gauge sense wire, and the 10-ga. red main power feed wire all go on the big battery cable stud on the solenoid. The 14-ga. black ground wire (for the blower and wiper motor) goes under the head of the outboard starter attaching bolt. Do NOT reverse the 20-ga. black wire and the 14-ga. black wire connections (lousy design - they should have been different colors). View "B" shows a "battery cable" under the outboard starter bolt, but that's for non-A/C cars - your battery ground cable is on the driver's side, bolted to the bellhousing.

[Jim S.]

Re: 66 327/300 convertible with factory AC wiring question

Hi John ,

I agree that we are probably not talking about the red in line fuse wire , but another red wire .

Where I disagree (respectfully !) is that I do indeed have those standard wires shown in UPC 12 , and you can see them in the second picture . They are wrapped in black tape as one bundle until they reach the last few inches. As you describe ,red , 2 black , pink, and purple .By the way, by 66 they did make the two different black wires non reversible as they spliced the one black wire to the red one .

Below those wires in the second photo , two additional wires ,the "Heavy Red" and "Thinner Black" are the ones I am inquiring about . They come from another harness , and are exposed , or devoid of black tape , and separate from the instant they leave the rest of the harness above. (first photo ) I am pretty sure they come from the A/C harness , but what do I know ?

I think I finally tracked them down on the AIM , but am too stupid to be sure . You tell me if I have indeed found them . See photo of the solenoid and the 10R and 18 B .

Jim

[Keith B.]

Re: 66 327/300 convertible with factory AC wiring question

for factory AC cars you do not use any of the standard production engine harness heater blower motor leads. you use everything in the add on AC harness

[Jim S.]

Re: 66 327/300 convertible with factory AC wiring question

Keith ,

Are you trying to say that the red and black wire I am referring to are also redundant ?

As I poorly tried to state above , to me, electrical diagrams may as well be written in an enigma code !

Jim

[Keith B.]

Re: 66 327/300 convertible with factory AC wiring question

If you have factory AC with the correct add on AC harness you do not use any of the production engine harness plugs for the blower motor or dash harness heater connecters.

I don't recall those red or black wires on the 67 AC car I just finished and I don't have any of my GM books to reference off of.

[Jim S.]

Re: 66 327/300 convertible with factory AC wiring question

Guys,

I just pulled out my old Harness and snapped some pics of it so you can now see the whole thing to scale .
It now appears to me that the red wire which measures approximately 30 inches from the main harness , and would be halfway between the wiper motor and the blower motor when installed , is in fact the Fused Red Wire as Gene stated originally .

Thoughts ?

Jim

[Jim S.]

Re: 66 327/300 convertible with factory AC wiring question

Guys,

I just pulled out my old Harness and snapped some pics of it so you can now see the whole thing to scale .
It now appears to me that the red wire which measures approximately 30 inches from the main harness , and would be halfway between the wiper motor and the blower motor when installed , is in fact the Fused Red Wire as Gene stated originally .


Thoughts ?

Jim

Ok Guys,

I just got off the phone with two VERY helpful gentleman named Jeff and Darrin at M&H Wiring. They say that despite the 66 AIM drawing on UPC C60 E-9 , that the revision , making the inline fuse wire run all the way to the Horn Relay was called for on 4-13-66, and probably not put into use until much later .This according to their original GM drawings .

I asked for a copy of that , and was turned down. However that got me to thinking that if they are indeed correct , there should be a ton of C2s w/C60 owners out there with my type of harness , and a red wire that runs to the starter solenoid . No ??

Jim

[Keith B.]

Re: 66 327/300 convertible with factory AC wiring question

just begs the question when was your car built? and it might be time to do a survey

[Jim S.]

Re: 66 327/300 convertible with factory AC wiring question

I'm up for it .

This thread was started by a Nov 12, '65 car. We never did get the date on his friends car , and mine is a May 1st 66 .

That's 3 .