87 Starion TSI need help

I had my Starion for awhile now but hadnt have time to fix it yet. My problem is that when I use the signals the car shut off and drains the battery. I have to recharge the battery to restart the car. everything else works... signals are the only problem.... can someone please help me I'd appreciate it step by step

bring the altenator and battery up to discount auto to have checked. isuspect one or both may be bad. and check yer fuse panel