Same problem here on 2001 Tacoma; starter didn't operate even when jumped by another vehicle. Battery read 12.5V, so I checked the starter relay, starter contacts, ground wire. All ok. Removed starter & had it tested at parts store and it was ok too.
The problem? Battery had an internal short. Found it by disconnecting battery and hooking truck power & ground cables to another truck's battery using jumper cables. It fired right up. Replaced battery and it works perfectly.
Friday, October 12th, 2012 AT 6:03 AM