Blinker Problem

Dec 8, 2004
New Ulm, TX
The left turn signal indicator (77 fj40) on the dash was blinking faster than normal. This alerted me to a problem as the right turn signal indicator was blinking at the normal rate. Sure enough, the left rear blinker was not working. I replaced the bulb and it worked until I cranked the motor. It then blew. For grins I tried another bulb. Again, it worked until I started the motor and then it blew. Where should I start looking to find the problem. Any help is appreciated.

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