sm465 swap wont start now

[Amillionoh7]

I just swapped in a 81 sm465/205 into my 87 7oor4/208 k5. in the process I also swapped in a steering column that does not have the mfs. well now my ruck does nothing when I turn the key. does anyone have a wiring diagram for the 81 and 87 ignition

 

[dyeager535]

I've had decent luck with the links below, in my sig. Some files apparently aren't real useful (too small to read clearly) but others I've looked at there appear fine.

 

[nvrenuf]

What is "mfs"?

Sounds like a neutral safety switch issue.

 

[dyeager535]

Multi function switch was my guess. I think that's a new name for a column mounted lever/switch/doohickey activator. Ever since the race started to cram as many levers onto a steering column as you could. Guess mounting some stuff on the steering wheel keeps that mess from getting worse on modern cars.

 

[Amillionoh7]

Yes I meant multi function switch.

And thank you very much for the link.

 

[Stomis]

Yeah basically you need to wire your park neutral safety switch through a clutch safety switch now. Or just delete it all together and jump the two 12ga wires together at the park neutral switch.

 

[my kids took the truck]

This is what I have that has worked - seen it on other Chevys too:

• a switch on my dash that goes from a battery terminal to the hot lead on the HEI
• a push button on the dash that goes from a battery terminal to the starter solenoid

Startup: flip switch and push button
Shutdown: flip switch


Other than bewildered looks from friends, a good solid setup

 

[82355]

Or just jumper your neutral safety switch, and use the factory key switch.

Martin

 

[nvrenuf]

Or just jumper your neutral safety switch, and use the factory key switch.

Martin

Winner

 

[my kids took the truck]

Just in case someone stumbles on this thread somewhere down the road - my switch/button setup had the complicating factor of bypassing the points style resistor power supply for the new HEI distributor.

 

[Amillionoh7]

Just in case someone stumbles on this thread somewhere down the road - my switch/button setup had the complicating factor of bypassing the points style resistor power supply for the new HEI distributor.

This is a possibility but I still need to wire my turn signals and headlights up somehow because the steering columns wiring is way different from my old one to this pre 87 style