volvo s80 crazy car
 

i was driving the other day and hit a bump in the road and i noiced that my temp gauge stopped reading, then all hell broke loose, the break failure light came on along with the abs light an the stc light, and the car didnt want to drive anymore like it was stuck in high gear. ive been trying to research it and have found it might be the abs modular, but im not sure that would cause all of this. i went and bought a new battery because i was having problems with it and to see i it was caused by improper voltage. didnt help. put the car on jack stands ad turned it on all good untill i touch the gas or put it in gear then the car throws all the lights on. i read something about wires you can solder by the abs modular but cant find the article again, and i read something about the dim???? driver instrament something or there that can mess up. let me know what you think dont want to replace the abs modular but will if thats the problem

https://volvoforums.com/forum/volvo-850-16/abs-controller-cover-removal-11104/
That is the fix post.
I would try that first then get the codes cleared and see what happens.