Went for a drive in my 70 yesterday. Once stopped I had to restart it. Starter lugged very slowly so I boosted it. Battery was at 12.5 volts but is in the trunk. Started. Went about my business for a few hours. Started no problem and drove an hour home with no issues.
The solenoid is a factory piece mounted in the stock location. Does this act like a knife switch meaning only on off or is there resistance in it ?
How can I test the starter while on the car ? Pitfall of having a lowered car with headers hinders the removal.
What else can I look into ?