General Electrical Forum

cdnpont · cdnpont

I'm thinking the Electrical section is kind of light on reference material, so I'll try to add what I can. wouldn't it be nice to have something like this over on CT? I can only image the amount of work this took. Anyone know how you produce and store this kind of PDF type document to link to? Kind of wonky, s...

cdnpont · cdnpont

Even with a dead simple fuseblock like the 65-66 B body, it can be sometimes a little perplexing as to how and what the fuses actually feed, the power paths, and how they are actually fed. You can't really see what's going on unless you have the block off and can see the back. While the 65-66 chassis manual...

cdnpont · cdnpont

Having a little bit of trouble with my column switch, the little switch assembly is really fussy. To help troubleshoot I decided to actually figure out how that little mystery switch works, and what is what. Seeing as it's a hit and miss on the web, I created a diagram for us showing how the contact pins a...

cdnpont · cdnpont

...do you lose current to the alternator field, and then have a dead alternator? Or... do most GM's of our era have a secondary resistance wire run parallel to the idiot bulb for just that scenario? Never would have given this a second thought until lately, and the wiring diagram does not describe it ve...

cdnpont · cdnpont

As I was really looking for better charging at idle than the original 10DN could deliver, I finally got around to installing the CS130D alternator I got from Carl last year. The CS130D is able to deliver 100 amps at idle. While a 10 or 12SI internally regulated alternator would be a good choice as well, I...

a421cat · a421cat

Looking for diagnostic info, schematics, troubleshooting info for 62-64 Pontiac dash mounted tachs used on Canadian and American B bodies.

hsebastian · hsebastian

My car is undergoing a full resto right now and I have collected the clock and radio, hoping to find someone who knows how to refurbish/restore them. After visiting the electronics, electrical and auto shops at my local technical college I tried several clock and watch repair shops and nobody wants t...

cdnpont · cdnpont

Question; Can a Delco Remy style 12Si internally regulated alternator allow the back be moved or "clocked" into 4 different positions? I'd really like to do a 94 amp internal style on the 69, and rather than look for the right clocking, can I just buy one and turn it myself? Are they the same as a 10Si in th...

DonSSDD · DonSSDD

How do the cold and hot light 2 post sensors work? From what I can find out, it is 2 sensors combined in 1. What Im wondering is, I assume the hot side will work alone if I only connect the wire from the sensor hot side post. But can I use the wire for the cold side light to be my GEN light for my alternator which re...

66 Beau · 66 Beau

Were Canadian Pontiacs ever positive ground? If so, when did they switched to negative ground? I found this comment on-line, but I suspect it is US based, and maybe not applicable to Canada? GM went to 12 volt negative ground in 1953 for the new Buick V8's, Cadillac, and Oldsmobile V8's. Chev and Po...

classic · classic

I have a mid 80's GM with a antennae in the windshield. The car has an after market Sparkomatic AM FM casette radio. The casette works fine, the AM barely works and the FM doesn't. I am suspicious the antennae is not working. I have removed the radio from the car and have checked the wiring and all is corr...

cdnpont · cdnpont

On the 69 Parisienne Convertible, the top motor switch is fed through a connector attached to the Bat aux connector on the fuse block. 20 amp. This push on pigtail connector also feeds the underdash courtesy lamps. Question: Why is the top motor not fed from the 30 amp firewall circuit breaker, like il...

horder · horder

My 66 uses an MSD Ready to Run distributor (no box). I run a stock small cap to keep it looking original. My coil started to leak oil so I bought a new black MSD Blaster 2 coil. Once installed my vintage Sun SST 802 R tach would read way too high at idle. I switched it to a stock type coil and the tach works perfec...

cdnpont · cdnpont

What started out a an intermittent no crank has now become permanent on the 65. I can jumper to the starter relay and she'll fire right up. Just no key start. I disconnected the weatherpack plug (blower/starter) I added in the engine harness back when. Jumpering to the solenoid side of the plug "B" tur...

shiky · shiky

Hey guys quick question for i think i am going senile.driving home in my 67 beaumont from a car show my turn signal stopped working,i figured its my flasher which is suppose to be on fuse box.i was amazed it wasnt there so started wondering if it fell out or someone took it. anyway i replaced it and still no...

jmont64 · jmont64

I have a couple of wiper motors that I am testing out. I know one is a 2 speed and I thought the other was a single although they look the same. The 2 speed worked great in the car. Question is how do I test for the second speed. Have gotten them to work as a single but not sure on what prongs to be touching to g...

cdnpont · cdnpont

I wanted to see my charging state on the 65 as I didn't install a voltmeter. I know Carl has done this before, and it's a good solution that covers both needs in a elegant way. The cigarette lighter is kind of redundant anyways. No idea on the parasitic drain it might put on the battery, but I'm assuming it'...

cdnpont · cdnpont

From a ongoing post on ChevyTalk, On my bone stock 65 2dr HT. For some reason, the bulb stays on (both filaments of the 1157 bulb are lit) when the car is off and the light switch is off. Replaced the bulb and it did function for a little bit (including the blinking bulb). I did have to jiggle the bulb around i...

cdnpont · cdnpont

Anyone know what type of bulb does the newer super tach II take? I have that nice reproduction Pontiac dash tach from Brad (63gpman), and want to match the colour to my dashights, which are LED. Is it a T3 wedge? Thanks, Mark

bjburnout · bjburnout

https://www.hagerty.com/media/opinion/the-hack-mechanic/circling-the-drain-sussing-out-parasitic-drains-requires-a-multimeter-and-creative-sleuthing/?utm_source=SFMC&utm_medium=email&utm_content=MED_UN_NA_EML_UN_DailyDriver_Monday&hashed_...

Topic		Started By	Replies	Views	Last Post
	STICKY: 1965 CP B Body wiring diagram, (Preview) I'm thinking the Electrical section is kind of light on reference material, so I'll try to add what I can. wouldn't it be nice to have something like this over on CT? I can only image the amount of work this took. Anyone know how you produce and store this kind of PDF type document to link to? Kind of wonky, s...	cdnpont	0	1131	Jan 11, 2022 by cdnpont
	STICKY: 1965/66 B body Fuseblock Detail (Preview) Even with a dead simple fuseblock like the 65-66 B body, it can be sometimes a little perplexing as to how and what the fuses actually feed, the power paths, and how they are actually fed. You can't really see what's going on unless you have the block off and can see the back. While the 65-66 chassis manual...	cdnpont	8	1205	Jan 10, 2022 by cdnpont
	STICKY: 65-68? Column signal switch and harness diagram. (Preview) Having a little bit of trouble with my column switch, the little switch assembly is really fussy. To help troubleshoot I decided to actually figure out how that little mystery switch works, and what is what. Seeing as it's a hit and miss on the web, I created a diagram for us showing how the contact pins a...	cdnpont	5	1395	Oct 18, 2020 by cdnpont
	If your "Alt" idiot light bulb was to burn out on your 69... (Preview) ...do you lose current to the alternator field, and then have a dead alternator? Or... do most GM's of our era have a secondary resistance wire run parallel to the idiot bulb for just that scenario? Never would have given this a second thought until lately, and the wiring diagram does not describe it ve...	cdnpont	12	355	2 days ago by cdnpont
	Installed a CS130D alternator in my 69 Parisienne. (Preview) As I was really looking for better charging at idle than the original 10DN could deliver, I finally got around to installing the CS130D alternator I got from Carl last year. The CS130D is able to deliver 100 amps at idle. While a 10 or 12SI internally regulated alternator would be a good choice as well, I...	cdnpont	8	101	3 days ago by cdnpont
	1962-64 Pontiac Tach (Preview) Looking for diagnostic info, schematics, troubleshooting info for 62-64 Pontiac dash mounted tachs used on Canadian and American B bodies.	a421cat	6	252	March 25th by a421cat
	1969 Beaumont Deluxe Clock (Preview) My car is undergoing a full resto right now and I have collected the clock and radio, hoping to find someone who knows how to refurbish/restore them. After visiting the electronics, electrical and auto shops at my local technical college I tried several clock and watch repair shops and nobody wants t...	hsebastian	6	237	March 10th by seventy2plus2

	Alternator clocking questions. (Preview) Question; Can a Delco Remy style 12Si internally regulated alternator allow the back be moved or "clocked" into 4 different positions? I'd really like to do a 94 amp internal style on the 69, and rather than look for the right clocking, can I just buy one and turn it myself? Are they the same as a 10Si in th...	cdnpont	2	657	Sep 22, 2023 by cdnpont
	Temperature sensor 2 post type question (Preview) How do the cold and hot light 2 post sensors work? From what I can find out, it is 2 sensors combined in 1. What Im wondering is, I assume the hot side will work alone if I only connect the wire from the sensor hot side post. But can I use the wire for the cold side light to be my GEN light for my alternator which re...	DonSSDD	11	676	Sep 14, 2023 by 67Poncho
	What year did GM Canada switch to negative ground? (Preview) Were Canadian Pontiacs ever positive ground? If so, when did they switched to negative ground? I found this comment on-line, but I suspect it is US based, and maybe not applicable to Canada? GM went to 12 volt negative ground in 1953 for the new Buick V8's, Cadillac, and Oldsmobile V8's. Chev and Po...	66 Beau	6	544	Sep 6, 2023 by 67Poncho
	radio antennae (Preview) I have a mid 80's GM with a antennae in the windshield. The car has an after market Sparkomatic AM FM casette radio. The casette works fine, the AM barely works and the FM doesn't. I am suspicious the antennae is not working. I have removed the radio from the car and have checked the wiring and all is corr...	classic	10	1970	Sep 5, 2023 by Greaser
	1969 Power top. Electrical question (Preview) On the 69 Parisienne Convertible, the top motor switch is fed through a connector attached to the Bat aux connector on the fuse block. 20 amp. This push on pigtail connector also feeds the underdash courtesy lamps. Question: Why is the top motor not fed from the 30 amp firewall circuit breaker, like il...	cdnpont	11	511	Aug 27, 2023 by seventy2plus2
	MSD Blaster 2 Coil - Tach Issue (Preview) My 66 uses an MSD Ready to Run distributor (no box). I run a stock small cap to keep it looking original. My coil started to leak oil so I bought a new black MSD Blaster 2 coil. Once installed my vintage Sun SST 802 R tach would read way too high at idle. I switched it to a stock type coil and the tach works perfec...	horder	4	1267	May 28, 2023 by horder
	Cranking electrical issue. (Preview) What started out a an intermittent no crank has now become permanent on the 65. I can jumper to the starter relay and she'll fire right up. Just no key start. I disconnected the weatherpack plug (blower/starter) I added in the engine harness back when. Jumpering to the solenoid side of the plug "B" tur...	cdnpont	2	1152	Aug 22, 2022 by oshawacliff

	re turn signal (Preview) Hey guys quick question for i think i am going senile.driving home in my 67 beaumont from a car show my turn signal stopped working,i figured its my flasher which is suppose to be on fuse box.i was amazed it wasnt there so started wondering if it fell out or someone took it. anyway i replaced it and still no...	shiky	6	1152	Jul 5, 2022 by seventy2plus2
	Testing out a 2 speed wiper motor? (Preview) I have a couple of wiper motors that I am testing out. I know one is a 2 speed and I thought the other was a single although they look the same. The 2 speed worked great in the car. Question is how do I test for the second speed. Have gotten them to work as a single but not sure on what prongs to be touching to g...	jmont64	12	2531	Jan 24, 2022 by 65Camino
	Voltmeter/charger dash trinket ( 1 2 ) (Preview) I wanted to see my charging state on the 65 as I didn't install a voltmeter. I know Carl has done this before, and it's a good solution that covers both needs in a elegant way. The cigarette lighter is kind of redundant anyways. No idea on the parasitic drain it might put on the battery, but I'm assuming it'...	cdnpont	36	2286	Jan 12, 2022 by cdnpont
	Electrical gurus... Any thoughts on this phantom signal light issue? (not mine) (Preview) From a ongoing post on ChevyTalk, On my bone stock 65 2dr HT. For some reason, the bulb stays on (both filaments of the 1157 bulb are lit) when the car is off and the light switch is off. Replaced the bulb and it did function for a little bit (including the blinking bulb). I did have to jiggle the bulb around i...	cdnpont	13	1533	Jan 6, 2022 by hawkeye5766
	Newer Sun Super Tach II. What bulb? (Preview) Anyone know what type of bulb does the newer super tach II take? I have that nice reproduction Pontiac dash tach from Brad (63gpman), and want to match the colour to my dashights, which are LED. Is it a T3 wedge? Thanks, Mark	cdnpont	1	1297	Oct 19, 2021 by 65Camino
	Parasitic drain (Preview) https://www.hagerty.com/media/opinion/the-hack-mechanic/circling-the-drain-sussing-out-parasitic-drains-requires-a-multimeter-and-creative-sleuthing/?utm_source=SFMC&utm_medium=email&utm_content=MED_UN_NA_EML_UN_DailyDriver_Monday&hashed_...	bjburnout	1	1296	Oct 19, 2021 by Canadian Poncho
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