Not getting charged battery.?
Thread Starter
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Not getting charged battery.?
1977 350 w/auto. Pulled starter today after finding a loose solenoid.
Installed brand new solenoid. Have small wire for the IGN switch and two heavy wires for the solenoid large post. Started right up, several times. But I question if the battery is charging.
Dash gauge shows 13 + V.
Battery shows 12.4 V engine off.
Battery shows 13.4 V engine running.
ALT shows 13.4 engine running.
Question:
How does voltage get from the ALT to the BATT?
One of the three wires on the back of the ALT?
Indirect route to the solenoid, then to the BATT?
Installed brand new solenoid. Have small wire for the IGN switch and two heavy wires for the solenoid large post. Started right up, several times. But I question if the battery is charging.
Dash gauge shows 13 + V.
Battery shows 12.4 V engine off.
Battery shows 13.4 V engine running.
ALT shows 13.4 engine running.
Question:
How does voltage get from the ALT to the BATT?
One of the three wires on the back of the ALT?
Indirect route to the solenoid, then to the BATT?
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Yeah your charging voltage and battery voltage seem to be low. Try a battery tester which will load test the battery - with engine off of course. Then you can measure batt voltage with engine off and with it running. Engine running gives you alternater charge voltage.
I use cheap harbor freight batt tester but I see their over $20 now. Small enough to keep one in each car and makes testing electrical charging system fast - something you can do on the road anywhere.
I use cheap harbor freight batt tester but I see their over $20 now. Small enough to keep one in each car and makes testing electrical charging system fast - something you can do on the road anywhere.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
1977 350 w/auto. Pulled starter today after finding a loose solenoid.
Installed brand new solenoid. Have small wire for the IGN switch and two heavy wires for the solenoid large post. Started right up, several times. But I question if the battery is charging.
Dash gauge shows 13 + V.
Battery shows 12.4 V engine off.
Battery shows 13.4 V engine running.
ALT shows 13.4 engine running.
Question:
How does voltage get from the ALT to the BATT?
One of the three wires on the back of the ALT?
Indirect route to the solenoid, then to the BATT?
Installed brand new solenoid. Have small wire for the IGN switch and two heavy wires for the solenoid large post. Started right up, several times. But I question if the battery is charging.
Dash gauge shows 13 + V.
Battery shows 12.4 V engine off.
Battery shows 13.4 V engine running.
ALT shows 13.4 engine running.
Question:
How does voltage get from the ALT to the BATT?
One of the three wires on the back of the ALT?
Indirect route to the solenoid, then to the BATT?
I would not worry to much because it is charging...and your battery is darn near at 'full' of the charge it can take.
The 0.2 volts is so insignificant ..that it is not enough to worry about.
There is NO horn relay like on a 1968. The horn relay is inside the car and does not have wire from the alternator gong to it.
DUB
