Final Update: See the final 2 images. Currently running a load of laundry.
Transistor: NPN - 2222A
Relay: Universal Dorman Automotive Relay
Battery: 9V Duracel
The double capacitor volt reduction didn't work. (Image 6 using 10k ohm top and 1k ohm bottom)
What transistor would work with 14.5v @ 1mA to Base, 9V Battery (+) Collector, Emitter to Relay (Prong 85), Relay Prong 86 to 9V Battery (-). See diagram below.
I have a washing machine PCB that is on its last limb. The new machine is on it's way, but still a month away from delivery. The problem is the drain pump won't drain the water. The pump itself is fine. Initially I thought it was the relay that was bad, so I removed it. However after further inspection I discovered that the low level current being sent to the relay is severely low. Whatever component that sends that low voltage (14.5v) signal to the relay is damaged. It still sends 14.5v as expected, but only 1mA (milliAmp). I measured with a multimeter. This is not enough to energize even a small relay. 14.5v x 1mA = 14.5mW I believe that is correct. The spec sheet on the relay says it needs 200mW for its coil to activate the relay, so we are not even close to that with only 14.5mW.
After removing the relay, I soldered on 4 wires to the PCB to where the relay connected.
2 wires for low level current (14.5v) the signal.
2 wires for the high level current (~150v) this is the completion of the positive current for the drain pump.
I've replaced the relay that I removed with an automotive relay. The high level current connects to 30 and 87 just like on the previous relay. For 85 and 86 however, I've wired in a 9V battery and a toggle switch. 9V positive goes to toggle then to 85. 86 goes to 9V negative to complete the circuit. When I turn the toggle switch on it activates the drain pump. Yay!
This is an ok solution for the next month, but I was hoping you could help me identify a transistor that might work in place of the toggle switch. The Base would be powered by the 14.5v 1mA low level current from the PCB. The collector would be attached to the 9V battery positive. The emitter would be attached to 85 on the relay. And finally 86 on the relay would be attached to the negative 9V battery.
As of now, I have to Homer Simpson style manual override the drain pump 3 times per wash cycle. A transistor would be helpful if you think it would work with the given power levels.
Washer Repair: What I have: What I want: Updated Diagram: Top 2 wires are high voltage (Relay prongs 30 & 87) Bottom 2 wires are the low voltage signal to activate the relay (Relay prongs 85 & 86). Updated diagram with a voltage drop. This ended up working: (currently running) Actual Implementation (the toggle switch is no longer connected):