Starter Test Point—is *definitely* NOT the two-terminal plug near the Coil! That's the one for testing CO test point for the LH 2.0 (pink wire) and for shutting the IAC to set/adjust Base Idle speed (blue/white wire). I don't think either of these should get 12 volts applied to them.

The Bentley diagram for '84 shows the Starter test point (aka "Service Socket") to be have a Blue wire. It should be in the firewall area above the starter, with a black terminal housing (female spade inside).

Putting 12V to it energizes the solenoid & spins the starter. Just like the crude way of doing it with screwdriver.

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Bruce Young,
'93 940-NA (current)
'80 GLE V8 (Sold 5/03)
'83 Turbo 245
'76 244 (lasted only 255,000 miles)
73 142 (98K)
'71 144 (track modified--crusher bound)
New 144 from '67 to '78
Used '62 122 from '63 to '67