Originally Posted by
WATAJK
He's not at fault.
His insurance doesn't do anything in a third party claim.
Your thinking of full comp.
If your driving a car that your not be, someone hits you, yet your not at fault, his insurance still must pay for the damages.
Reverse the other way, if your at fault, then yes, your claim is void.
The truck hit him - He's not at fault (Like in most situations when a car is rear-ended)
He's hit the car in front - Usually the driver who hits the other up the ass is at fault but in this scenario is different as the truck has possibly pushed him into the other car causing the damages, so i believe the truck is at fault for 2 claims.
OP - I don't think your car is written off, but it will be close.