Another weird wiring issue

Has it always been this way since you've owned the car, or is this a new behavior?

It may be the internals of the hazard switch have failed. These switches do have a history of failure.

Garth

Don't know is the honest answer. I bought the car as a project so never tried it before the restoration.

One option is to see if I can borrow a hazard switch I know is working from another owner to check if the internals of mine have gone, easier said than done though.

If you have an Ohm meter you could check the switch contacts

the problem sounds like it would be associated with the 49a combination of contacts
here is a contact matrix that might help

quote:

It may be the internals of the hazard switch have failed. These switches do have a history of failure.

Ditto.

Get a thin, flat tooth pick and use it as a wedge between the red hazard button and the black housing. Try different points and test the lighting functions. Maybe select 3-6-9-12.

IF your problems go away during your testing, you have found your culprit.

At this point, you can choose to do what many owners have done and .....leave the toothpick right there.

Or replace the little booger. They require your full attention to not screw up the wiring order/placement.

The switches are common to many BMW cars and should be easily sourced from the UK or Roland in Germany. If you go that route, be aware there are some small differences between units that outwardly appear the same. Ask and all shall be revealed.

Good luck.

Larry

quote:

Originally posted by Horace Cope:

Hazard switch works fine and all 4 corners flash as normal.

left turn signal works as normal.

right turn signal the lights work as normal but the hazard switch light flashes.

Horace

the current shown in blue is due to a path created by a short across the "R" to "31" contacts

Switch



This should work, and it is a fair price.

This is a close cousin to the unit used in our Panteras, but the unit pictured mounts in a hole and is retained only by the tension of its retaining tabs.

The unit used in our cars is retained with a threaded nut on the backside of the dashboard hole.

I cannot say whether the pictured unit is electrically the same as the original Pantera unit.

Larry

Larry you are right. It is held in place slightly different than the OEM. Fortunately that will not be evident once the Switch is sitting in the Dash. Regarding the Pins they are the same as the OEM apart from one which is labeled with a different Terminal # but serves the same purpose. Our 59d (instrument light) is called 58b on this Switch.

They also sell a another Switch which is held in place with a large Nut like our OEM but it has a different appearance and looks more "bulky"

Jan

Thanks Jan

I have already ordered this same item last Thursday so hoping for delivery tomorrow. As you say its very good value for money at less than £10.

Glad you mentioned about the terminals, I was wondering how it would wire up compared to the original.

Cheers

Sounds great, let us know if this solves your initial problem

Hi Jan

Sent you a PM

Appears like the Hazard Switch from Carbuildersolutions.com in the UK is a good replacement for the OE Switch (late Pantera)

Wire Color --> Switch Terminal
P/BK --> (49a)
LB --> (R)
LB/Bk --> (L)
Bk --> (31)
Y/Bk --> (58b)
Y --> (49) (and add a Jumper to Terminal 30b)
Gn --> (30)
Rd --> (15)

Yea good solid replacement switch and for under $10. The wiring took a bit of working out initially as there are 10 terminals on the new switch as opposed to 7 on the original. It didn't come with any wiring instructions but Jan is correct with the wiring order above.

Very slight enlargement of the hole in the dash needed but my problem now solved, all working fine.

cheers