1.1LiterGasEater

When i hit the brakes the lights dim, when i hit the hazards or the turn signal the lights dim with the beat. Maybe related last alternator only lasted 3 months.

rotary84

iTrader: (4)

I was thinking alternator is giving out.. is your alternator new or used? could also be bad ground somewhere

t_g_farrell

iTrader: (1)

Bad grounds.

Qingdao

iTrader: (3)

How old is your battery?

1.1LiterGasEater

i put new alternator and battery, grounds look pretty good, what about the voltage regulator does that affect anything and could it be my car is modified to the point where i need a turbo two alternator

1.1LiterGasEater

any other connection issues to look for

Qingdao

iTrader: (3)

What year RX7?

The 79 SA uses an external regulator.

If you are using the factory alternator then yes adjust the air gap on the regulator.

Kentetsu

Run a ground wire from the negative battery post to the frame. Should fix it.



.

rx7lives

Your ground wire should go from the battery, make a temporary stop at the frame and continue on to one of the starter bolts. The battery is connected to the engine but the grounds for all the electricals are connected to the frame so there has to be a connection to link them all and not lose anything in the process.

Plus, the stock alternator isn't all that great shakes and I've had more than one rebuilt one die soon after installation.

I'm going to put a GM 2 wire one on my car soon.