MLPS/ Park Neutral Switch Wiring
MLPS/ Park Neutral Switch Wiring I've sent some time searching and reading and have found conflicting info so I spent some time with a meter today and this is what I found. I have a good source for schematics but I couldn't find exactly what I needed regarding the park neutral switch. I had 2 dark green wires that went to the C1 connector. B2 to pin G on the 7 place plug and F11 went to pin F on the same plug. I had a schematic that showed me the Lt Grn in pin B was for the shift interlock. I also knew that the 4 wires in the other connector went to the PCM. I found that the pink wire on pin C powers the shift interlock Pin B in park AND pin F in reverse. This would lead me to believe that pin F could be used to activate a relay for backup lights or power them directly if using LEDs. The other pink wire on pin E connects to pin G in Park. This is the start relay trigger. My start circuit schematic was mislabeled with G going to F11 on C2 but should be C1. NOTE: I found no provision for start in neutral on this switch from pink to anything else.
In conclusion if my column has a neutral safety switch and no modern shift from park interlock I can eliminate 3 wires. If I use a shifter with backup light switch or put them on a toggle switch I can eliminate 2 more from that wad of wires coming up from the tranny. I hope this helps someone.
In conclusion if my column has a neutral safety switch and no modern shift from park interlock I can eliminate 3 wires. If I use a shifter with backup light switch or put them on a toggle switch I can eliminate 2 more from that wad of wires coming up from the tranny. I hope this helps someone.
I've sent some time searching and reading and have found conflicting info so I spent some time with a meter today and this is what I found. I have a good source for schematics but I couldn't find exactly what I needed regarding the park neutral switch. I had 2 dark green wires that went to the C1 connector. B2 to pin G on the 7 place plug and F11 went to pin F on the same plug. I had a schematic that showed me the Lt Grn in pin B was for the shift interlock. I also knew that the 4 wires in the other connector went to the PCM. I found that the pink wire on pin C powers the shift interlock Pin B in park AND pin F in reverse. This would lead me to believe that pin F could be used to activate a relay for backup lights or power them directly if using LEDs. The other pink wire on pin E connects to pin G in Park. This is the start relay trigger. My start circuit schematic was mislabeled with G going to F11 on C2 but should be C1. NOTE: I found no provision for start in neutral on this switch from pink to anything else.
In conclusion if my column has a neutral safety switch and no modern shift from park interlock I can eliminate 3 wires. If I use a shifter with backup light switch or put them on a toggle switch I can eliminate 2 more from that wad of wires coming up from the tranny. I hope this helps someone.
In conclusion if my column has a neutral safety switch and no modern shift from park interlock I can eliminate 3 wires. If I use a shifter with backup light switch or put them on a toggle switch I can eliminate 2 more from that wad of wires coming up from the tranny. I hope this helps someone.
Last edited by ls1nova71; Aug 27, 2018 at 09:47 AM.
