I would recommend starting in the engine compartment — near the battery. Assuming you have a fresh battery, start by having a good look at the ground cable. The inside of the ground cable battery connector and the battery post should be cleaned with a terminal cleaner wire brush. The same goes for the positive cable. The thick. heavy gauge ground cable must be connected to BOTH the car chassis AND the engine. An engine connection or a chassis connection alone is not enough, because the engine and transaxle mounts isolate the chassis from the engine using a rubber isolation design to block engine vibration from being transmitted to the car. This rubber also isolates the engine electrically from the chassis, so a ground cable connection must be made to both the engine and the chassis to restore full electrical connectivity from the battery to both the chassis and the engine.
Have a good look at the enlarged engine compartment portion of the schematic wiring diagram. Since the starter motor draws more electrical current than any other device in the car, the thick positive cable connects directly to the starter solenoid. THE OTHER POSITIVE BATTERY CABLE WIRE IS TIED DIRECTLY TO THE GENERATOR VOLTAGE REGULATOR, AND THEN CONTINUES ON VIA A SINGLE 10 GAUGE WIRE TO THE 8-WIRE MULTICONNECTOR IN THE ENGINE COMPARTMENT. THIS SINGLE WIRE PROVIDES POWER TO EVERY OTHER ELECTRICAL DEVICE IN THE CORVAIR! If you continue to follow that wire toward the instrument panel/dashboard area, you will see that it makes its way to a wiring harness junction point, and on to the ignition switch, the fuse block, and in some cases directly to other switches and devices without passing through the fuse block.
So the 8-wire engine compartment multiconnector becomes the first point of possible power disruption for the remainder of the car. Even when both halves of the plastic multiconnector appear to be seated together tightly, the individual metal pins inside the connector may not be making a good electrical connection. The multiconnector is subjected to age, heat, moisture, and vibration for many years. The metal pins inside may get corroded, damaged, or bent, which can disrupt the electrical connectivity so that electrical current will not pass through.
For example, the thick 10 gauge black wire that is routed to the multiconnector from the voltage regulator connection is supposed to pass through the multiconnector and then travels to an unfused junction point in the harness. From there one of the wires is connected directly to the main light switch — where power is distributed to the lighting system throughout the vehicle. This power does not pass through the fuse block, so even though your fuse block is corroded and aging, its condition does not impact many of the vehicle lights! However, power to the brake light switch and via the turn signal flasher does come from the fuse block, and is then routed to the turn signal switch on the steering column. The ignition switch also does not control most lighting, but does impact te turn signal flasher. So if your headlights and tail running lights are not working, you must look to the harness connectors, wiring, and light switch for the cause. Tracing each circuit on the schematic diagram reveals the operation of each circuit, the understanding of which is essential for effective troubleshooting and fault isolation.
Left-click the image to enlarge it for better viewing or "Pan & Scan". Click a second time for maximum enlargement...
- 1963 Corvair Passenger Car Combined Schematic
==================================================================================================
CORVAIR COMBINED WIRING SCHEMATIC DIAGRAMS
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M&H manufactures wiring harnesses that are sold by Clark's Corvair Parts. Their catalog and contact information is shown below...
66vairguy wrote: » Thu Sep 03, 2015 12:46 pm
I'm an electrical person and I just wanted to say I had a great experience with M&H Electrical Fabricators in the Los Angeles area...
...Clark's sells M&H wiring harnesses and as far as I can determine M&H is the ONLY supplier that makes ALL the Corvair harnesses, even the one wire with connectors for the Spyder/Corsa thermistor (drives the temperature gauge).
I stopped by M&H's place of business and they were very helpful (I'm modifying one of their harnesses) and knowledgeable. I've used their harnesses in both my cars and fit and function is excellent.
M&H makes harnesses for lots of cars, but there commitment to the Corvair is worth noting. There are other suppliers, but over the years I've seen a number of so called "Corvair" wire harnesses from other suppliers that were incorrect or badly assembled that caused owners problems.
http://www.wiringharness.com/
Mailing Address:
M&H Electric Fabricators, Inc.
13537 Alondra Blvd.
Santa Fe Springs, CA 90670
TELEPHONE
Sales and Customer Service: (562) 926-9552
Technical Support: (562) 926-9562
e-Mail Address:
sparky@wiringharness.com
Most rear circuits route through the engine compartment multi-connector (below the voltage regulator, near the firewall). The number of metal connector pins inside depend on the Corvair model year, ranging from 8-12 pins. This rear multi-connector is a common source of trouble, as it is subjected to age, vibration, heat, and moisture for many years. Even when the outer plastic shell halves appear to be tightly connected, the internal metal pins may not be providing good electrical connectivity, as they may be loose, dirty, corroded, or bent.
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BY TONY MARKOVICH MARCH 2, 2021
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Hi all , well engine finally in and on the key.
1966 Corvair Corsa Convertible
Thankyou all I’m on it rain stops play so tomorrow it is
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