Light illuminated on dashboard causing a steering and other problems

A client complained that when he was on motion is airbag shot. Eventually, he noticed that the smoke was emanating from the engine bay. Hence, he pop-up the hood and saw that the smoke was coming from the ABS module. He called a mechanic to unplug the ABS module connector. Afterward, the connector was connected back. Henceforth, he has noticed that his steering is stiffer to steer. Additionally, he said : "the car isn't moving smoothly as before."

Yesterday, he called and said even the headlight and other lights aren't working again in the car.

The check light appears first, brake light second then finally the P/S light appears. They lights don't come out at once. It's a 2010 Toyota Corolla Le.

Please how do I fix the problem?

You may want to start with a full system scan confirming communication and possible DTC.

On this brand of toyota corolla the abs module plays a vital rule on road performance, I think the general system scan will be the best option on this issue

The client is a novice about car and was unable to give me a good explanation. I didn't see any sign of airbag shooting when I saw the car personally. I told him that the airbag is still Ok. He made a mistake in his explanation. The only thing I saw was that the ABS connector was unplugged and headlights were bad in the car.
What i noticed from the car was that when it's first started the RPM raise to about 2,500 and then drops to about 700 RPM on it's own.
Probably there could be a short on the instrument cluster as well because I noticed a blink once after about every 25 seconds throughout idling except the car is shut-off. He said that was how it was when he purchased the car from someone till date.
In addition, the speed clock doesn't raise when driving and the car is intermittently hard to start.
P0335 and P0500 were the only codes I retrieved

i would start by following the p0335 and sorting the Crank position sensor/circuit issue first. get the starting and running sorted so i had a stable platform to chase the other issues.