1986 Toyota Pickup charge and brake light

1986 TOYOTA PICKUP
186,000 MILES • 4 CYL • 4WD • MANUAL
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DJC250R
  • MEMBER
  • 1 POST
when I turn on my head light and I am driving my truck, my charge light and brake light on my insturment cluster flashes on and off irraticaly. I put a new battery in and tested my alternator at 14 volts. what could it be? also my check engine light comes on once in a while, if I let off the gas pedal and coast the truck it goes off quicker. could that be the knock sensor?
Thanks for your help, Dan.
Oct 28, 2008 at 1:35 PM
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MASTERTECHTIM
  • CERTIFIED EXPERT
  • 4,750 POSTS
if the brake light and battery light are coming on then replace the alternator. the reason for both lights coming on is the bulb check in the dash gets its power for those from the voltage regulator on the alternator. your alternator may be charging now but its going to die real soon.
Oct 28, 2008 at 6:13 PM