1998 Toyota Rav4 BATTERY VS ALTERNATOR

1998 TOYOTA RAV4
250,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
MZGLOEE
  • MEMBER
  • 1 POST
How do i know if my battery is dead or if I am having problems with my alternator. I open my car door and the lights came on dimly and then went out, when I put the key in the ignition nothing happened.
Feb 8, 2009 at 6:15 AM
Advertisement
Avatar
MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Get a jump and take to any autoparts store for a free diagnosis, they will check the condition of battery (amps) and alt. output loaded and unloaded.

Make sure you tell them you may need a jump to restart because the engine will have to be shutoff and started to complete the procedure.

OR,

A simple test is to use a multimeter, with engine running, connect to battery in DC volt mode. Multimeter should read 13.5-14.5 volts, if less than 13 then alt. is bad.
Check loaded (high beam lights on, blower motor on) and unloaded (electrical loads off).
Feb 8, 2009 at 11:14 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle