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Hi Jennifer The abs unit is pretty robust however the plastic connector that plugs into it is a lot more likely to break if hit. If its a case that you have just knocked it and you have no warning lights on dash when driving I wouldn't be too concerned about it. If however it has taken a good hard thump you are in the same boat you can only tell a problem has occurred if an abs warning light stays on. If you are really concerned get it looked at by a dealer that way you will have peace of mind. Good luck.
1. I would not be concerned because if there was a failure in the ABS you would definitely get an ABS warning light and the ABS and most likely the stability control/traction control systems (with added warning lights) will all switch off .
2. You can test if the ABS is operational. On a very quiet damp surface, straight, wide road( with NO other cars around), apply your brakes hard from a very low speed - up to 20 mph ONLY driving in a straight line - until the car stops. The front brakes should attempt to lock up under hard braking and if the ABS is operational you will feel it kick in and the brake pedal will pulsate as the ABS constantly allows brake pressure and then releases it to prevent the wheels from locking up on the damp road. If the ABS does not kick in be ready to release the brake pedal quickly to allow the wheels to rotate so you can steer the car safely. Without the ABS the front wheels should begin to lock up on the damp road surface due to the low level of tire grip. ONLY test this at very low speed and ONLY when driving in a straight line on a straight section of wide road with no other vehicles around.
Have you scanned the codes? You need to find out why the light is on and correct the problem. After fixing the cause, the code reader may be able to clear the codes, if not try diconnecting the battery for 20mins to 1/2 hour.
my next step is to MANUALLY attempt to see if this engine will turn. Disconnect battery, remove starter completely which will expose the flywheel. With a HEAVY flat blade screwdriver partially inserted by a tooth in the flywheel, exert pressure in a pivot movement trying to move the flywheel . If it doesn't move the engine is seized.
The ground wire in the trunk area, coming from the brake light harness, might have come off or really loose. Hope this will get your lights working again. Best wishes.
Check your coolant level. If it is low and there is no obvious signs of a leak do a compression check on the engine (possible blown head gasket) or the fan / thermostat is not working properly.
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