OBD fault code reading needed

2008 ATH10W: After returning from pleasant drive in the rain yesterday, I turned into my driveway and then.... Warnings lights, loss of power, shuddering rear axle.

Limped into my garage. Talked to AI, because I don't have an OBD reader. Asked me to bridge pins 4 and 13 and look for a flash sequence to identify/clear the fault. No such luck. Plenty of flashing but no patterns to read. AI gave up. But I can't really, can I?

After bridging pins 4 &13, the engine warning light had gone when I turned on the ignition. The engine started. Whew. But when I moved the shift into D, warnings lights low power, shuddering rear axle. Mmmm.

So I would like to hear from anyone who has some time to offer advice.

PS There are 4 dash warning symbols when put in gear: red engine warning and three amber, 4WD VSC & Brake icon.... Thanks

Edited 1 hour ago1 hr by Clivus
Additional information added.