Having issues starting my 1886. I turn the key to start and sometimes it will click and other times it will not. New battery in the fall and 12+ volts. If I jump from the pos terminal of the battery to the starter side of the solenoid the started cranks over and will start if key is in the on position. I tested the safety switches and they all test good. I tested the ignition switch with continuity when in the start position and I get continuity. I tried testing for voltage and it either is not working, or I am not testing correctly.With the socket disconnected from the key switch, you should get 12v in one of the socket terminals. (The other side of the volt meter should be on the NEGATIVE terminal on the battery, or a known good ground.
If you don't get voltage going into the key switch, you will not get voltage out to the solenoid. ....There is circuit breaker on the 1886-01 between the battery terminal of the solenoid and the negative terminal of the ammeter. .....If the breaker is good, you should get 12v between the ammeter post and ground.
The red wire leaving the key switch socket goes through the trans interlock switch and the PTO interlock switch then to the small terminal of the solenoid. ....If you do a continuity test between the switch socket terminal and the end of the red wire at the solenoid, this will prove the switches and wiring is good.
I assume if I pull off the small wire from the solenoid and turn the ignition switch to start, I should get 12+ volts? Yes.
To test to solenoid should I jump a small wire from pos terminal of the battery to the small post on the solenoid? Yes.
However, if the solenoid doesn't activate doing this, it's possible the solenoid is not grounded well. .....It is grounded through the mounting bracket, so rust or paint can create an intermittent or total loss of grounding. .....You can try jumping between the case of the solenoid and the NEGATIVE battery terminal to see if the solenoid activates with a good ground.
There are two styles of solenoids used on Bolens tractors - grounded and un-grounded. ......The 1886-01 uses the grounded type Bolens # 1717048.
and requires 12v to the small terminal to activate.
I'm assuming things were working properly in the past, so it is unlikely that the wrong solenoid has been used.