Note: These are the notes of a novice back yard mechanic so please be advised that you are following them at your own risk!
The following Images are from my stock 1966 Chevy / Chevrolet C10 Truck and illustrate the replacement of my Voltage Regulator and Alternator. It also shows my fuse box.
1966 Chevy C10 Voltage Regulator mounting and wiring (may apply to 1960 through 1966)
Make certain that the Voltage regulator (especially new solid state type that some say are better) are grounded before you connect the battery so you don't harm the Voltage Regulator. This picture shows the Voltage Regulators ground wire connected to frame under the Horn Relay.
Notice the empty bolt hole at the bottom of this picture that is from a piece of of body I removed that is held in place by about 5 each 9/16 bolts (two of the 5 are different so remember which place they were in). I easily removed this long body part to gain clear access to the Voltage Regulator mounting bolts - see image of part below.
Stock mounting used 'well nuts' which you will probably destroy removing the VR so plan on buying a pack of various size grommets for about four bucks. Buy some 2 inch bolts, lock washers, and nuts also. There are three mounting holes. The Grommets are used to limit the vibration so do not use metal to metal mounts. Also see above for how the Voltage Regulator is grounded properly.
Looking down on the Voltage Regulator Connector you should see wires colored: Blue - White - Red and Brown
Note that when my VR went bad, a click noise could be heard when connecting or disconnecting the battery even with the key off. Also see next picture for the tab that you push down on to remove this Voltage Regulator Connector.
The VR will have one connector for each of the four wires and each of these four will be labeled with 'F' - '2' - '3' - '4' where the 'F' is for the Blue Field wire and the rest will follow. The connector and VR both have a key to insure the connection is plugged in properly. When you plug the connector in, make sure that it is held in place by the tab that is shown and told about above (next to Red wire). When disconnectiong, see more information below.
See that the connector (right next to the VR) that is aligned with the Red wire (3rd from front) has a small tab that must be depressed to remove the connector. Under the VR connection there is a small notch that looks like it's there to make sure the male (that has a key that aligns with it too) is compatible with the new or old VR.
See the 'Radio Static Eliminator condenser' (round under thumb) that I have read is not needed for radios made in the last 10 to 20 years. I cleaned mine up and used it to keep my vehicle original as possible. The condenser has a lead that is made to plug into a connector at the bottom of the VR. The condenser has printed on the top the following: 1960957 - DR - 6 MP -
View of the new Voltage Regulator that is now installed. Tthis is a digital VR which is now one of the few things that is not original on this Truck. Original equipment can get up in the neighborhood of $80.00.
1966 Chevy C10 Alternator wiring
Shows main positive connection
Shows the two smaller connections left of the main positive where the black is the field marked 'F' and note that this will have continuity to the blue wire on the VR connector (disconnect battery positive first before measuring). The Red wire is the Rotor marked 'R' on the back of the Alternator and note that this must have continuity to the white wire on the VR connector.
Above shows the back of the Alternator where the Field - marked 'F' and the Rotor - marked 'R' have connectors. See the 'F' and 'R' in the image
Please see the end of this page for step-by-step voltage regulator replacement instruction, final notes, and how to test your voltage regulator
1966 Chevy C10 Fuse Box - Various pictures of the same box
Click here to see another site's picture that shows the heater fuse placement above the Radio fuse.
Note that I have read that there is a mounting screw under one of the fuses
Please remember that I am not a professional mechanic and cannot guarantee this information as safe or accurate.
Here is a forum where someone explains how to convert your external Voltage Regulator to an internal. I don't know if it is correctConvert external Voltage Regulator to internal Voltage Regulator for Chevy Trucks>
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