electrical problems

[chango13]

Recently started having a lot of electrical problems with my truck
I can’t have more than 2 items on with out losing power
I.E. If the headlights are on the then:
turn on the a/c and the a/c panel dims out.(the a/c still blows cold air)
The power windows roll down real slow
Interior lights will not turn on
wipers also operate slow
radio turns off and on
And if I step on the brakes the power completely goes out

Check all the fuses they were good
Alternator is good and so is the batt.
New ECM didn’t fix the Prob.

looks like bad ground somewhere but don't know where

[formulaross]

Don't just check the grounds. Check the positive supply wiring as well. It takes a completed circuit for power to flow, both the supply and the ground, and it sounds like you have a bad connection or broken wire somewhere.