The taillight circuit is powered through the taillight relay. The coil of this relay is energized when the healight switch is in the PARKINGLIGHT or HEADLIGHT position. Power thus flows through the 15-a taillight fuse to be lighting circuit. The right and left marker lights are powered directely from the fuse.
The remainder of of the taillights and the licence plate light are powered from the fuse trhough the light failure sensor.
If none of the lights operate, either the light swicth, the relay, or the fuse has failed.
Test the fuse first, if it good, test the relay next and then the light switch and its wiring.
For the headlights not casting much light
I suppose you mean your headlights are too dim
check for a low battery voltage, a faulty battery terminal connection, or a failing relay control.
A voltage drop test accross the relay contacts should show near 0 V,
If the voltage measurement is greater than 0.3 VDC across these contacts, the contacts are failing.
Tuesday, December 26th, 2006 AT 8:46 PM