jsilerjr

I read the tech bulletin you linked to and it say's: "This bulletin documents the recommended practice of installing of a diode to Aftermarket Solenoids/Relays to Suppress Voltage Spikes (this is in the event Non-Automotive Grade relay or solenoid has been used). This diode installation eliminates potential excessive voltage spike." so it looks like you only need to add the diode if you use a non-automotive grade relay. Is the Bosch 12VDC 5-pin relay SPDT 30/40A p/n-330-079 listed in OP an automotive grade relay? I'm thinking that it is an automotive grade relay and the diode addition would not be needed in this case, correct? Thanks.

here is the product description from parts express, I would say , from reading this, it is automotive grade and a diode would not be needed .. 12 VDC Tyco 5-Pin Relay SPDT 20/30A (Formerly Bosch) 12V, 30A relay popular in automotive sound and security installations. Plastic housing with mounting tab. Tyco Electronics has acquired the automotive relay business of Robert Bosch GmbH and is now manufacturing this relay to the original Bosch specifications. SPDT, 20/30A. Equivalent to Bosch #0 332 209 150. Mfg. #V23234-A1001-X036. Made in Portugal.

Great Post .... I used to it power my two 7" LCD Headrest Monitors. It was easy and fast withe instructions you gave.. now I have have RAP power to the video system. Thanks JS