Your old detector is probably a CCI 7719. CCI went out of business in 2008. The 2 red wires go to your 2 battery banks. The yellow wire goes to the solenoid/valve. The coil on the solenoid/valve is 9 volts DC @ 168ma. If you keep 12 volts applied to the coil for an extended period of time, the coil will burn out.
1: You can remove the solenoid valve and replace the detector with a cheap 2 wire detector. You will then loose the capacity of the detector turning off the propane in case of a leak.
2: You can purchase a 3 wire detector, with 12 volt solenoid valve @ 1 amp, from Safe-T-Alert. for about $200 on Ebay.
3: Your CCI 7719 is repairable. Contact Larry at CCIRepairs@gmail.com for details. I have one of Larry's repaired detectors on my 95 Bounder. It's been flawless.
Richard
