Re: Alpine MRP-M500 shuts down
I have the same amp, usually good amps and this amp has been used for 3 years, ran hard and nothing ever happened to it. It has even been hooked up to a wall outlet by the previous owner LOL. It's still going strong. Get the MM and check the voltage coming from the REM wire from your HU, because it sounds like to me something is going wrong with it. When you touch the positive and the REM together, it should turn the amp on and that's a good sign the REM wire is messed up. It could be something as little as a loose connection at the back of the HU. Check that and let me know, I'll help you as much as I can.
1991 Ford F150 XLT Lariat
Two Kicker DS65 Coaxial Speakers
JVC KD-R320 Headunit