alternator

[jessie1]

i just put E fans on my truck when both fan come on the alternator gauge drop to about 8 amps and it slowey goes back up to 14 amps its does good with the ac off

[567234ta]

is this a question of some type or an update?

[RedHeartbeat]

I hope you mean 8 volts. If your alternator only puts out 14 amps you're in serious trouble. Yeah, there is a severe power surge when the fans both kick on. If one then the other kick on it won't be an issue.

[jessie1]

yes i did mean volts what would cause it to drop so low

[RedHeartbeat]

Serious amperage requirements to start the fans spinning from a dead stop times two motors. It's just simple electronics. There's a heavy power drain when they first start up. It recovers after their spinning so no foul. If you could delay the second fan from starting about 10 seconds after the first fan then the power drain wouldn't be so bad.

[567234ta]

would a capacitor help? do they have them on already?

[RedHeartbeat]

You could actually use a capacitor on the small power wire on the relay to delay when the relay triggers. I used to know that electronics junk 25 years ago but have forgotten how to calculate the capacitor size you'd need to delay the voltage for a given amount of time.

[jessie1]

thank for the help

[Hit Man X]

Just buy a larger alternator.

[airdeano]

how are these fans wired? direct, relays, switches?

airdeano