"Is it the ALT or the battery?" You are basically asking the same question each post.
We have NO WAY of knowing if it's either or neither. That's why you need to take battery in as suggested. Testing beats guessing.
You need to spring into action. Do not dwell on the heater motor drawing amps or the alternator or the voltmeter. Concentrate on the slow crank. That is your ONLY issue. FIRST THING is get the battery load tested by someone with a carbon pile tester. If good, Check cables, if good check alternator output by placing multimeter probes across battery posts while motor at about 1200 RPM to get 13V-14V. If all that is good.............may be starter.
Does the motor always finally start? Define "hard time cranking". How long before starting? Is battery at 12.6V before you begin cranking?
Last edited by bartamos; 11/14/2024 8:20 AM. Reason: clarification
