Radiator fan Problemo

[1989se-i]

yo, when my radiator fans come on, my car idles really rough. Here are the things i can think of:
1] POS battery
2] Fans wayyyyyy outta balance
3] POS battery
4] POS battery

Any thought?

[smufguy]

check your ground. it might be also. in some rare cases it could be ur altenator. but if ur car does not do that when the ac is on, then its not your altenator, or even if u turn on the lights. Check ur fan relays, see if swaping them in the junkyard would solve this. IF not, open ur fuse box, u shoudl have another relay in there.