1997 850 t5. Problem with the turn signals and hazard lights not working intermittently. It is completely random. They will work normally for a while, then, usually after turning off the car and restarting, will not work at all. I have replaced the hazard switch and turn signal stalk without help. Any suggestions? Thanks.

 

could be a connector or a balky relay or a bad ground. try pulling down the wiring diagrams to look for common junction points/relays/fuses in the circuit path.

Volvo Wiring Diagrams

 

Thanks for your suggestions, and especially the wiring diagrams. They are much more clear than others I've had access to. I will check these things out.