by 38racing » Tue May 11, 2021 5:51 pm
So today. The connector for the module is 8 pin but only 7 have wires to them. Not in physical order , pins 1&2 are to ground. Pin 3 is to the magneto kill tab via the pto switch. Pin 4 is to the reverse switch. I'm assuming there is an internal switch between these latter 2 pins and turning on the module opens it, preventing the reverse switch from grounding the coil. That leaves the other pins. Pin 5 is to battery +. Pin 6 is a feed to the parking lever switch. If parking switch grounds this pin then module turns off. Pin 7 is to the keyswitch terminal A2 and is connected to keyswitch terminal L when key is arm position. L is always to ground.
So with engine off I test all pins (except 3&4). They read what they should with key in both running positions. Pins 1&2 have continuity to ground. Pin 5 has battery voltage. Pin 6 has no continuity to ground. Pin 7 has no continuity to ground in normal run and has continuity to ground in the 'arm' run. With engine off enabling and turning bypass on works. LED stays lit.
So I start the engine. I repeat tests on all the pins as above. Every reading is the same as when engine is not running. I kept each test connected for an extended time to see if any of them blipped. None did. I tried to turn module on. Either nothing or LED came on for a few seconds and then went off.
Unfortunately the starter solenoid is not easy to get to but I am going to try and splice into the wire going to the starter solenoid. I will arm and turn on the module. Then I will start it with a jumper to the solenoid so that the key stays in the 'arm' position. I'll see if the module now stays on with the engine running. Not sure what the result will mean though, either way.
My only other thought is that the 8 pin connector is an upgrade to the 7 pin. 8th pin is connected to ground
"When the OCR was first introduced for the 2005
model year, the module only had 7-pin in the harness connector.
In 2006, an eight pin was added to the module. The
eight pin is grounded and help protect the module from
system noise"
I'm wondering if the 7 pin would fail like mine is doing and hence the upgrade to 8 pin. Maybe this upgraded feature has also failed in mine?
$60 for a replacement is an expensive test.