101eagle-vet

I looked but couldn't find the difference between S4 / S5 light switch, is there one?

Icemark

Externally and wire up, there is no difference.

Internally, Mazda used a cheaper relay on the S5 switch for the headlights, but beefed up the traces on the parking and headlight circuits to help prevent burn out of the board.

101eagle-vet

So is this why when i plug it into my harness, my lights pop up but don't come on everything else work's fine, but my head lights i have two of them and they both do the same thing ? I'm trying to get dash light's and came acroos these two switch's. And was hoping this would solve my prob.

Icemark

well the lights popping up should happen if the headlight cleaner switch is on, or the headlight switcg itself is on.

If the headlights themselves are not coming on, then you probably have a bad dimmer relay or your headlight switch is bad or the wrong headlight switch harness has been used.

If this is a new problem and the headlight switch harness and turn signal switch are the same as what came with the car, you can rule out the last one.

101eagle-vet

Well the switch's ( there are two of them ) , and harness are not from the same car so that is probaly what's wrong with them then. Now i have two headlight switch's i need to get rid of and i need the one in my car fixed. I drive at night and work for a police deparment so i need the dashlights. cheif is getting on my *** about it.

Icemark

I have rebuilt headlight switches on my webstore. A couple different versions depending on what you want to spend.

As far as the headlight switch harness, yes it must be of the same series. For example if you used a S5 headlight switch in a car that had a S4 turn signal switch, the headlights and high beams would not work correctly.

Same thing is you used a S4 light switch harness on a S5 car.

The Turn signal switches are the key, and then how the harness plugs into the dash harness.