I used the 13913. Think I got it at NAPA. Cut off the plug and splice it in. I didn't save the receipt, but I think it was around $35. Wayne Dohnal 1994 S4 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.8/184 - Release Date: 11/27/2005