Sad to say this 87GN belongs to my sister. She has owned it since new. Lately the 30 amp fuse for the brake system blows. Replaced it and after a while blows again. Not up to stuff with this Roadmaster system, she has the factory GM service manuals, I read the section for the Roadmaster, but will have to read it again to understand. Just need some guidance here.
Nice web site, have to spend more time here.
Thanks in Advance,
Al
Have a look at some of the stuff at http://www.gnttype.org/techarea/brakes/brakespage.html
If its blowing the fuse, the motor may be siezing up. There is at least one source (other than GM) for the motor/pump by itself. Rebuilt units are also available.
The Powermaster (not Roadmaster) system can be frustrating, but when its working right, its a good system.