Battery Draining

[c110gtr]

Hi

I've got a '77 FJ40 with 351 Cleveland

now the FJ's been sitting in the garage for like a week without starting and tonight I started her up 1st go, drove 15 kms highway driving and turned her off, 2 mins later don't have enough juice to start her up again.
Had to jump start it with my other car while its revving around 1500rpm or a lil more to have enough to start the FJ40.

I didnt have my multimeter handy so would like to ask for opinions or suggestions if this is a battery not holding up the charge or the alternator not charging the battery?

I drove this FJ40 2 weeks ago for 8hrs and had the same issue when re-starting.

How do I test if its the battery or the alternator going?

Cheers

[Thylacine]

Sounds like a crook battery (assuming no ALT light or low voltage/excessive current on dash meters (did 40's have ammeter or voltmeter? - can't remember) but could be as simple a loose terminal/poor earth-point.
First step check battery (your local auto-elec/battery place should load-test it for free and take it from there.
cheers



ed

[zuki60]

To check the charge rate of the battery with muilti meter
check battery voltage vehicle not running all lights and acc's off.
should be 12.5 -12.8 volts then start vehicle should be 14.2 or close to that . also check with load on the alternator. headlights on high beam, spot lights on and see if there is a difference.

[Swerve]

I know it sounds stupid but check your water level in your battery, I have been caught out once or twice on that.