Needed: '89 900SS wiring diagram

joost · Post by **joost** » Mon Sep 01, 2008 2:19 am

Marelli electronic ignition, single pick-up. The wiring diagram resembles the 906 paso wiring, but not completely. So if anyone could help, grazzi

Thanks in advance

Joost

cafe*racer · Post by **cafe*racer** » Tue Sep 02, 2008 7:50 pm

Joost, check this out http://www.bevelheaven.com/manuals/900S ... %20180.htm You can find this and other info here http://www.bevelheaven.com/manual-index.htm Let us know if this helps, Jordan

joost · Post by **joost** » Wed Sep 03, 2008 12:02 am

Hi Jordan,

Thanks for your reply. Before I posted this topic I checked beavelheaven.com (amongst a lot off other sites/places) for the manual/wiring diagram, but it seems like the 1989-1990 900SS manual is the only one which is not available somewhere.

As I said, it resembles the 906 paso diagram a lot. It uses a lot of paso parts, so (maybe..) that's not weird. The only major difference from the paso wiring is that the power/current to the ignition coils and electronic ignition unit is switched on/of by means of a solenoid that is operated by the run/off switch. I think that it has something to do with improving the the reliability/endurance (quicker switch on/off of the power) of the Marelli unit, because that unit is (and always was) a real problem child.
Anyway, this solenoid is causing major problems, and I prefer to rebuild the wire harness to the one used on a 906 (easier and normal application). But if there's a very good reason to use the before mentioned solenoid, it is beter to rebuild it in original state.

Joost

cafe*racer · Post by **cafe*racer** » Wed Sep 03, 2008 10:59 am

I hate to say but your SS may be too new for the published liturature. Have you tried a local dealership or repair shop? Many often keep older manuals for reference.

joost · Post by **joost** » Wed Sep 03, 2008 11:28 am

Yep, tried that too.

cafe*racer · Post by **cafe*racer** » Wed Sep 03, 2008 11:47 am

Best thing to do is keep posting on here and get involved in the discussions. Someone out there with more knowledge will be able to help.

wdietz186 · Post by **wdietz186** » Wed Sep 03, 2008 8:19 pm

If you can dig up a diagram from a 89-90 750 Sport it would most likely be the same. I think what you are calling a solenoid is a relay used to power the coils and it is there to avoid running the current through the kill switch.