Is it *actually* time for a cap?

[operationcougar 10+ year member]

haha, and the truth hurts sometimes, im not naming any names but a "guy" in cali used to just pack the cases with sand, then sell them. and he sold them!

thats how little they do, i have got a cap on my highs amp, but not really for the use of it, more for the looks. and a voltage display from the trunk

 

[Johnny Drama 5,000+ posts]

Lots of replys and Im skipping all of them.

I would suggest you isolate the system from the main car electronics. You cant really stop the dimming. Add another battery it may help you, but isolating it will 100% stop your dimming.