you should only have three wires, 2 large ones go on the large diameter post on the starter solenoid, one small one in the small post. Worst case? Starter, cables and battery are toast.
If you wired it up correctly at the starter, make sure you put the cables on the battery correctly, not reversed. If that's ok, check the whole starter harness for cracked insulation that has caused the inner wire to ground to something.
Check
Clark's Garage Home Page for proper starter installation. There is a picture of the starter connections on the starter page.
Disregard where it says to install the heatshield to the negative post of the starter....it installs to one of the winding housing bolts...those are the two bolts you see in the picture at the back of the starter, not over where the wires are.
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1989 944 NA Glacier Blue - SOLD IT
1989 944 S2 Alpine White T-Boned (totaled) by a lady dressed in a CLOWN costume (RIP
) Apr 89 - Mar 08
1988 944 Turbo S Silver Rose Metallic, K27/6, Vitesse MAF, Tial 38mm DP WG
Semper Fi