Scott, I have repaired several RPM relay's and most of the time the relay just comes loose from the PC board or the relay coil burns out because it's own as long as the car is running. I have yet had to replace the 555 chip. The other problem is the contacts burn and need cleaning and re adjusting. Now that I have new ones in stock at a low price I haven't fixed many in the last year. John Hervey www.specialTauto.com -----Original Message----- From: Scott Mueller [mailto:scott.a.mueller@xxxx] Sent: Wednesday, April 30, 2003 4:10 AM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] RPM Relay Repair I am always interested in learning how a device works or how to repair it. I am looking forward to the repair procedure. I changed the subject line to reflect the project being taken on by Elvis. Scott Mueller 002981 RNDOLA