All 4 turn signal lights flash simultaneously

Snake...the turn signals are 2 separate circuits. For 'Safety' they are wired Diagonally, I.E. Left Front plus Right Rear to one circuit and the Right Front plus Left Rear on the second circuit. Each circuit has their own Fuse. The safety is...should one fuse Blow-out, there will Still be a Flashing Light on 'That' Side of the vehicle.

You are correct in thinking the problem could be in the Hazard Switch or there is a Short/Connection within the 'Turn Signal SWITCH'. Something has 'Connected' the two circuits into two Parallel Circuits. I would also check the 'Wire Connection/Junction Block', located Just above the Steering Column, and the Fuse Block, itself. With both circuits flashing off ONE Flasher, I would expect the Lights to Flash at a Faster Rate!

Good-Luck in Your Testing!

MJ

Thanks for the info.  Will check out the junction block and switch today. Cheers, Tom

Parking and tail lights are split as Marlin says but turn signal/flashers are not. Since the emergency flasher has been removed that leaves only the turn signal switch or wiring as a culprit. Look for something shorting between the switch contacts or possibly a melted wiring insulation that is tying the two sides wires together.

...I Stand Corrected! Forestg is correct, the Turn signals are NOT wired Diagonally! And the Parking Lights along with the Taillights ARE wired Diagonally!!

MJ

Thanks everyone. I ordered a new turn signal switch

I would do further diagnostics before replacing an expensive switch. I have heard that the new switches tend to have problems. I would look into wiring first.

When I took the switch out it was held together with a zip tie from a previous band aid. It’s toast.

Where did you order the new switch from?  

Thanks.  Let's us know how it works out.

👍

It would be great if you could post three or four photos showing the details of the new switch.

I purchased one from the capri vendor team blitz, there is an advertiser on eBay USA and I found a distributor in Germany  I suspect they are all coming from the same source  

Larry

I will take some pics when the switch comes in. The price on these is all over the place. I think Ebay has a used one for $600 crazy money.

Current eBay:

I looked at that one on ebay but the connector on the Pantera harness does not match up to that one. You’d have to rewire the switch harness.

Do you have any actual confirmation that what you ordered will be arriving with the correct connector?

I learned many years ago that a “replacement” part may or may not be the original OEM piece. And I’ve also learned that our vendors’ definition of “bolt-in”often implies bolt-in after sufficient modifications have been performed.

YMMV

Very curious to see what connector is attached to your signal stalk.

Larry

I checked the photo on Wilkerson’s web site and it has the correct connector. The connector on the Pantera is white the one on Ebay is black. Also you can see the spade connectors on both and tell them apart. He’s been in the Pantera business for 40 years so I assume he would have the correct part. It’s been shipped in stock USA not from China, we’ll see when I get it and will post results.

Yes Jake, one could make that assumption.

However, I have found that experience often dispels assumptions.

I am of course hoping it arrives with the correct connector. We shall see.

Larry

I have installed Wilkinson's turn signal switch into two Panteras and found them to be compatible with the factory wiring.  And his switch operated as expected.

I received the turn signal switch today and it looks perfect.  Well made, connector the same as original.

Thanks for the update. Good to know it is a true plug-and-play replacement part.

Larry

Good to know.  Please report back once installed.  

Tom

Clean the earth points on both the rear lights both on the body and the light cases. Make sure the spade connections ae sound. You can get this cross circuit effect through bad earths that have slowly deteriorated.

Also the turn indicator stalk assembly looks pretty well the same as the one that was fitted to the 70's Ford UK Cortina which crop up occasionally.

It may have a close cousin that was installed on Cortina‘s, i’m not quite sure.

but I am quite sure the steering column is in fact a MK1 UK Capri steering column including the turn signal stalk and the ignition lock assembly.

To allow the column to be used in the Pantera, DeTomaso actually removed about a 12 inch section of the steering shaft and then welded together the top and bottom sections.

Larry

Thank you both foe your input. Should have everything back together next week and will revert with outcome  

Thanks Larry - I did not know about the Capri connection. Very interesting !