Engine/starter grounds

[912R]

Hi all,

I have an 83 944. It has been off the road for a long while, so we have been slowly recommissioning it over the past year or so. Initially once we got it going after doing the belts, etc., it started fine. However, it has become harder to start - kind of had to hold the key in the start position and then the starter would engage. I replaced the ignition switch suspecting that, but no change in symptoms. Now on most occasions, it won't even engage the starter - dash lights will dim, but no starter turnover. If I lay underneath it and short the terminals on the starter, it will start fine.

Now my main suspect here is a ground situation between the ignition switch and the starter. Is there a decent diagram of where the main grounds are on the 944 to check? Any other hints?

Thanks in advance!