Overcharge now low/no charge
Ok folks asking for some help here. 1972 Duster slant 6 grandma car. No signs of hack job wiring. Only thing modified is h4 conversion headlights and a pertronix set up in the dist. From previous owner.
Last week noticed ammeter would peg under high idle and would climb and drop with throttle. Parked the car and started reading. Found a few threads about Overcharging and Voltage drop along with the MAD mod. Didn't have a multimeter at the time but started following my wiring. Pulled the bulked head connector, cleaned it, cleaned and replaced VR with mopar VR, had a Chinese one, cleaned VR connector, wirewheeled coating and sanded firewall for grounding. Cleaned starter relay. After all the cleaning I noticed the black wire from ALT. Connector in bulkhead started to melt. Followed it through the firewall to find 8-10" of melted black wire in cabin. Followed it all the way through the dash to make sure to cut out all the bad.
At that point did the MAD mod. Ran new 10g wire from ALT. to battery relay with fusible link. Bypassed bulkhead and ran 10g wires straight through. Spliced ammeter wiring together with fusible link.
At this time I ask my neighbor if he's got a multimeter I could borrow and he does but I've never used one of these things and he headed out of town. Read up on how to use it, I think, and I assume I'm using it correctly but we all now what happens when you assume.
I realise I have no b4 testing to compare to but here's what I have found and here's the multimeter I'm using and setting.
New battery (2weeks old)
@ battery, probes to + and -
Battery & engine cold, sitting 2+hrs: 12.05v
Key on No start: 11.5v
Start engine, high idle warm up: 12.12-12.13v
Engine @ operating temp and running
Negative post to VR body:
.87-.90 mV @ idle
.20-.23mV @ high idle (1200-1500rpm)
Key on No Start
Black prob to blue field wire, red probe to + battery
9.23v slowly climbs to 9.55v
ALT stud to + battery
55-57mV
After doing about test, 30-45min checked the battery again and its @ 9.56V
I'll put it on the charge and let it trickle charge tonight
Ok folks asking for some help here. 1972 Duster slant 6 grandma car. No signs of hack job wiring. Only thing modified is h4 conversion headlights and a pertronix set up in the dist. From previous owner.
Last week noticed ammeter would peg under high idle and would climb and drop with throttle. Parked the car and started reading. Found a few threads about Overcharging and Voltage drop along with the MAD mod. Didn't have a multimeter at the time but started following my wiring. Pulled the bulked head connector, cleaned it, cleaned and replaced VR with mopar VR, had a Chinese one, cleaned VR connector, wirewheeled coating and sanded firewall for grounding. Cleaned starter relay. After all the cleaning I noticed the black wire from ALT. Connector in bulkhead started to melt. Followed it through the firewall to find 8-10" of melted black wire in cabin. Followed it all the way through the dash to make sure to cut out all the bad.
At that point did the MAD mod. Ran new 10g wire from ALT. to battery relay with fusible link. Bypassed bulkhead and ran 10g wires straight through. Spliced ammeter wiring together with fusible link.
At this time I ask my neighbor if he's got a multimeter I could borrow and he does but I've never used one of these things and he headed out of town. Read up on how to use it, I think, and I assume I'm using it correctly but we all now what happens when you assume.
I realise I have no b4 testing to compare to but here's what I have found and here's the multimeter I'm using and setting.
New battery (2weeks old)
@ battery, probes to + and -
Battery & engine cold, sitting 2+hrs: 12.05v
Key on No start: 11.5v
Start engine, high idle warm up: 12.12-12.13v
Engine @ operating temp and running
Negative post to VR body:
.87-.90 mV @ idle
.20-.23mV @ high idle (1200-1500rpm)
Key on No Start
Black prob to blue field wire, red probe to + battery
9.23v slowly climbs to 9.55v
ALT stud to + battery
55-57mV
After doing about test, 30-45min checked the battery again and its @ 9.56V
I'll put it on the charge and let it trickle charge tonight
