Turn signals went out
replace the fuses first. for turn/hazards.
the HAZ fuse 10 amps ., do hazards fail?????????
old car, very old. 1980 corolla.
first off, the lamps are brass based lamps. 115x lamps
they can short so replace them all or remove all of them
and put only 1 new lamp in (of the 4) if this works, good.
if not use a voltmeter to find the cause.
12v during a flash is good, 0v dead, 6v is shorted wires.
this is easy, dont panic, get the schematic for the car is best way.
The FSM has this but are rare for such and old car.
i looked online , alldata.com
and the schematic is there.
the path is from battery to ground as follows
10a haz fuse and 5am turn fuse. (2 fuse!)
the fuses drives the HAZ module
the HAZ module drives the lamps directly in HAZ mode
in blink mode the HAZ module drives the combo turn switch.
a bad flasher module KILL BOTH, (did it?)
the comb drives left or right side and the lamps are all grounded
completing the path of electrics, and the lamps glow.
current flows, and the lamps glow.
green-black is left
green-yell is left side.
the best test for this car, is to cycle the HAZ button over and over
until they work, most switches this old. 33 years are dirty and fail.
so cycle it. 10 times, if the HAZ fails.
it must work on HAZ or its all a wasted effort.
because the HAZ module feeds the binkers...
Jan 20, 2014 |
1980 Toyota Corolla