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Wiring diagrams
Posted by: Monza ()
Date: July 10, 2018 07:32AM

Does anyone know where I can find a good colored wiring diagram for a 1965 monza 140? Somebody put some really nice performance parts on mine, but did a questionable wiring job. For instance it's got a holley fuel pump, power for the EI, and power for aftermarket gauges all going to what I believe is a sorce wire with cloth insulation coming out of the original harness. Just a lot of bubba going on.

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Re: Wiring diagrams
Posted by: MattNall ()
Date: July 10, 2018 07:34AM

Contact / PM Aeroned He sells a colorized version.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
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..............................110-PG.................................................Webered-Turbo

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Re: Wiring diagrams
Posted by: Nickshu ()
Date: July 10, 2018 01:33PM

+1 on Aeroneds color diagrams. I got one from him for my '64 Spyder and it helped immensely. I blew it up and hung it on the wall in my garage during my restoration. Way better than the factory diagrams.

Nick
_______________________________________________________________________
1964 Monza Spyder Convertible #435 - Rotisserie restored - Check out my restoration thread here: [corvaircenter.com]
Recreational Mechanic/CORSA Member/COG Supporting Member/US Navy Veteran
Northern Colorado, USA

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Re: Wiring diagrams
Posted by: TerribleTed ()
Date: July 10, 2018 01:37PM

Monza Wrote:
-------------------------------------------------------
> Does anyone know where I can find a good colored
> wiring diagram for a 1965 monza 140? Somebody put
> some really nice performance parts on mine, but
> did a questionable wiring job. For instance it's
> got a holley fuel pump, power for the EI, and
> power for aftermarket gauges all going to what I
> believe is a sorce wire with cloth insulation
> coming out of the original harness. Just a lot of
> bubba going on.

Must they be colored? The ones in the GM shop manual are pretty adequate all in all and readily available. The manual notes that the cloth covered wire in the engine harness is the resistor wire that feeds the ignition. If this resistor wire is feeding accessories that need 12V that would not be ideal as it does not deliver 12V at the aft end.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]



Edited 3 time(s). Last edit at 07/10/2018 01:41PM by TerribleTed.

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Re: Wiring diagrams
Posted by: TerribleTed ()
Date: July 10, 2018 01:46PM

here is a link to a thread on Corvairforum.com that most of the wiring diagrams including 65. [www.corvairforum.com]

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]



Edited 1 time(s). Last edit at 07/10/2018 01:48PM by TerribleTed.

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Re: Wiring diagrams
Posted by: 66vairman ()
Date: July 10, 2018 01:50PM

Monza - Sadly few make up wiring diagrams when they start "modifying" the wiring with options, etc. That leaves the next owner in a bind.

If you have some electrical talent you'll figure it out. If not find someone with Corvair and electrical experience.

I help out the folks in my club and since I'm retired I just take a free lunch or exchange favors to solve electrical problems.

Clark's sells new harnesses if needed. The main harness is $$$$, but the engine harness is reasonable and if old usually needs to be replaced. Note the Corsa and Monza engine harness is different.

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Re: Wiring diagrams
Posted by: Monza ()
Date: July 11, 2018 10:18AM

I was looking at the fuse panel and I had an idea. On the fuse panel there's a plug for bat unfused. What if I tapped into that for the fuel pump and ran it through a relay controlled be the ignition switch? Then I could put the coil circuit back the way it was from the factory.

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Re: Wiring diagrams
Posted by: 66vairman ()
Date: July 11, 2018 12:20PM

Typically a relay uses very little power to activate and should only increase the ignition wire amperage a small amount. The BOSCH ice cube relays are popular.

So yes that would be one practical solution. If you want to add safety features to turn off the fuel pump if the engine stalls, or in an accident then it is more complex.

If the engine stalls I know to either start it up or turn off the key. In an accident folks can become disoriented and an impact switch located in the trunk is a reasonable solution and easier to wire in. Types of impact switches have been discussed here before.

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Re: Wiring diagrams
Posted by: TerribleTed ()
Date: July 11, 2018 07:02PM

Monza Wrote:
-------------------------------------------------------
> I was looking at the fuse panel and I had an idea.
> On the fuse panel there's a plug for bat unfused.
> What if I tapped into that for the fuel pump and
> ran it through a relay controlled be the ignition
> switch? Then I could put the coil circuit back the
> way it was from the factory.


Or you could power it from before the resistor wire in the engine bay. Or from an ignition switched circuit at the fuse box, or from the switched output at the back of the ignition switch itself (use an inline fuse if running this feed in a circuit that is not properly fused of course). I mount my electric pumps up front by the tank as is recommended so I like to use an ignition switched circuit on the fuse box. I often wire in a manual shut off switch on the way to the pump (good anti theft deterrant...they can not get far and car runs out of fuel) and also wire in a resettable inertia switch as a safety.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: Wiring diagrams
Posted by: Monza ()
Date: July 16, 2018 09:17AM

The part that actually fried was the resistance wire coming out of the plug for the ignition system. I'm trying to find out what is the resistance for that wire?

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Re: Wiring diagrams
Posted by: oldqmguy ()
Date: July 16, 2018 12:21PM

The 'resistance wire' used by Chevy had a total resistance of 1.8 Ohms.

This is the value you need to replace the original resistance wire. You can use an external resistor, but it must also be 1.8 Ohms. You can probably find the External Resistor at you local FLAPS. They are available in several different values so make sure you get "1.8 Ohms" and not some other value!

I can't find "resistance wire" in the Clark's catalog so I guess they don't sell it as an individual 'device' just part of the Engine Harness!? confused smiley

I hope this helps!

Dale cool smiley

Dale E. Smiley CPBE
Life Member The Society of Broadcast Engineers
RETIRED Broadcast Engineer
CERTIFIED CORVAIR NUT
CORSA/Circle City Corvairs/Corvair Performance Group
Avon, Indiana
WB9SFF
1967 4-Door Monza PG!

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Re: Wiring diagrams
Posted by: Timothy Shortle ()
Date: July 16, 2018 12:24PM

As already said Ned Madsen has done a very nice job making the wiring diagrams very clear and easy to read. Makes me wonder why car manufacturers did not (?).

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Re: Wiring diagrams
Posted by: curt ()
Date: July 16, 2018 01:56PM

ANY 1969 diagrams....they are different colors, for sure.

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Re: Wiring diagrams
Posted by: 66vairman ()
Date: July 16, 2018 02:57PM

Timothy Shortle Wrote:
-------------------------------------------------------
> As already said Ned Madsen has done a very nice
> job making the wiring diagrams very clear and easy
> to read. Makes me wonder why car manufacturers did
> not (?).

Tim - I worked back in the days when aerospace had "hand drawn" diagrams. This was before the computer revolution took hold as cost effective "Computer Aided Design" around the 80's.

Hand drawn work was labor intensive (expensive), especially when the engineering folks kept changing things. There was constant pressure on the drawing departments to keep costs down. After high school I had a summer job helping the art and draftsmen folks. When I ended up in engineering I always showed them the respect they deserved.

Now those jobs have been replaced by computers and CAD/CAM operators.

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Re: Wiring diagrams
Posted by: 66vairman ()
Date: July 16, 2018 03:44PM

oldqmguy Wrote:
-------------------------------------------------------
> The 'resistance wire' used by Chevy had a total
> resistance of 1.8 Ohms.
>
> This is the value you need to replace the original
> resistance wire. You can use an external resistor,
> but it must also be 1.8 Ohms. You can probably
> find the External Resistor at you local FLAPS.
> They are available in several different values so
> make sure you get "1.8 Ohms" and not some other
> value!
>
> I can't find "resistance wire" in the Clark's
> catalog so I guess they don't sell it as an
> individual 'device' just part of the Engine
> Harness!? confused smiley
>
> I hope this helps!
>
> Dale cool smiley

Dale - I recently got out my old list of 1.8 ohm ceramic resistors and was surprised to see some are obsolete.

The FLAPS don't always list a value, they just want the make and model and of course nothing for the Corvair.

Autozone still carries a DR794 1.8ohm.

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Re: Wiring diagrams
Posted by: oldqmguy ()
Date: July 16, 2018 04:14PM

Thanks for the update! I may buy one or two just to have them on hand!

You never know when you will need one.

Dale cool smiley

Dale E. Smiley CPBE
Life Member The Society of Broadcast Engineers
RETIRED Broadcast Engineer
CERTIFIED CORVAIR NUT
CORSA/Circle City Corvairs/Corvair Performance Group
Avon, Indiana
WB9SFF
1967 4-Door Monza PG!

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Re: Wiring diagrams
Posted by: PaulMotz ()
Date: July 16, 2018 05:27PM

I PM’d aeroned on the 14th asking about The 64 very diagram but no response yet. Hope he’s still in business.

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Re: Wiring diagrams
Posted by: Timothy Shortle ()
Date: July 16, 2018 05:32PM

Ned is still around. I saw him in Kansas at their "JunaTuna" event in Wichita last month. I am sure I will see him at the Roundup in September. If he is in Pittsburgh next week I will let him know you are in the market.

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Re: Wiring diagrams
Posted by: Lane66m ()
Date: July 17, 2018 06:28AM

Here is the last time Aeroned was queried about his Wiring Diagrams. Really not sure if he is wanting to do them anymore. Just don't send him any money until you hear from him.

[corvaircenter.com]

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


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Re: Wiring diagrams
Posted by: reidmier ()
Date: July 17, 2018 08:17AM

Ned's color diagrams are definitely the best! Before I knew he had them available, I merged & colorized the '65 diagram from the factory manual. It's a large image that can be zoomed in but any errors in the original are likely still present. Color 1965 Factory Wiring Diagram

Reid M.
HACOA
Vegas Vairs
Washington, UT
65 Monza 110 PG

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