Ballast resistor on firewall

[DP Customs]

I'm chipping away at 55 years of wiring butchery on this '69 Shelby and found this resistor mounted inside the engine bay.  Someone hacked into the dash harness and ran a couple of pink wires to it.  I'm guessing this wasn't original equipment? I'm hoping someone can confirm. 

By the way, one of the pink wires is spiced into a red/green wire leading to the ignition switch, the other is spliced into a brown wire that shares the same plug terminal with the factory resistor wire. This car has a tach and it looks like the factory pink resistor wire leads to it. 

[J_Speegle]

I'm chipping away at 55 years of wiring butchery on this '69 Shelby and found this resistor mounted inside the engine bay.  Someone hacked into the dash harness and ran a couple of pink wires to it.  I'm guessing this wasn't original equipment? I'm hoping someone can confirm. 

No that is not factory

[Bob Gaines]

+1 not factory. In the uncommon event of the resistor wire failing you can ether replace with replacement resistor wire you got from ford or the after market equivalent . That ballast resistor was the fastest way to fix the problem which no doubt was part of the decision process for some.

[Bob Gaines]

Here is one that is designed to patch into the harness. https://www.ebay.com/itm/386769016050?

[DP Customs]

Thanks a lot guys, that helps explain quite a bit, cheers!

[Shelbypat]

If you replace that wire be sure to respect the length otherwise you would modify the resistance.

Patrick