Hazard Switch 6 vs. 8 prong for '74 2002tii

[cvvick]

I was replacing the hazard switch on my '74 tii (won't stay pressed in and I don't want to try to repair), and I noticed it was a 6 prong switch. The plug is 8 prong. Did the PO screwup? Should I get a 8 prong? The car does has some strange electrical issues (left running lights, dash board lights don't work.) They could be something else, but strange coincidence.

[Mike Self]

I went through this hazard switch goat-rope with a friend's car not too long ago.  On the modell 71 cars (12 fuse roundies that use the pushbutton hazard switch) there are three terminals that apparently aren't used:  P85, 58D and 31 (look for tiny numbers by each terminal).  That may explain the difference, as I believe the squarelights used the same wiring setup. 

 

As I'm sure you know, your turn signals get their power through the hazard switch through a set of terminal that are hot only with the ignition on, so a wonky flasher switch can make your turn signals either not work at all, or work strangely.  

 

I did a column on troubleshooting those switches, and also how to repair one that won't stay in the off position; PM me if you'd like a copy, or if you're a CCA member, check the July 2019 Roundel.  

 

cheers

mike

[HBChris]

A 74 needs the 8 prong switch with the resistor on the back.

[Mike Self]

AFAIK the resistor on the back of the hazard switch is what causes the internal light to be dim when the dash lights are on--until you turn on the flashers, then it goes bright.  A friend ordered a new hazard switch last year, and it didn't come with the resistor (which is wired between terminals 58d and the un-numbered solder lug).  And his flasher switch stays bright(er) with the lights on than it did with the old, resistor-equipped switch.

 

mike

[HBChris]

A 74 still needs an 8 prong switch.

[cvvick]

Thanks for the responses. I've acquired an 8 prong switch and will install/test once I get my battery back in the car (currently install euro front bumpers on my '74 tii)

[arban79]

I just bought a 1975. It also needs a new hazard.  Can anyone confirm the 75 model year needs the 8 prong option please? 
 

[HBChris]

It does and it has a small resistor between the spades.

[arban79]

Thanks for quick response