SAAC Forum

The Cars => 1969-1970 Shelby GT350/500 => Topic started by: DP Customs on March 28, 2024, 03:16:53 PM

Title: Ballast resistor on firewall
Post by: DP Customs on March 28, 2024, 03:16:53 PM
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. 

Title: Re: Ballast resistor on firewall
Post by: J_Speegle on March 28, 2024, 03:31:40 PM
Quote from: DP Customs on March 28, 2024, 03:16:53 PM
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
Title: Re: Ballast resistor on firewall
Post by: Bob Gaines on March 28, 2024, 04:09:16 PM
+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.
Title: Re: Ballast resistor on firewall
Post by: Bob Gaines on March 28, 2024, 04:12:36 PM
Here is one that is designed to patch into the harness. https://www.ebay.com/itm/386769016050?
Title: Re: Ballast resistor on firewall
Post by: DP Customs on March 28, 2024, 05:16:21 PM
Thanks a lot guys, that helps explain quite a bit, cheers!
Title: Re: Ballast resistor on firewall
Post by: Shelbypat on March 28, 2024, 08:41:38 PM
If you replace that wire be sure to respect the length otherwise you would modify the resistance.

Patrick