You will probably need to repair your relay socket. My heater fan began to cut out once in a while and started working again when driving over a pot hole or when giving the fuse/relay box a knock. A new relay did not help. Sanding, cleaning and bending of the contacts in the socket so they made better contact did only help for a while as the crimping was bad and corroded. I cut off the socket with several inches of wiring and replaced it with a good one off a breaker.
The connection must be very good as high current flows through the thick wiring. You can either solder it if you have good experience with a higher power soldering iron or crimp them together with a proper tool. Also replace the relay itself as it can have developed a high contact resistance (or take it apart and clean the contacts).
I wilk replace the relay !!
The connection seems really good, the relay pins were intact and was easy to pull out, only the socket was a little dark, but looks really undamaged..
Will ser if the new relay sorts it out...
The dar is going to paint shop today, it can run without the relay with no problems right ?
97" Diablo red GTI6