Welcome to the Alpine site.
The front door was mfg'd by PTL Engineering. 3333 JOHN CONLEY DR. LAPEER, MI 48446. PHONE:(810) 664-2310. FAX:(810) 664-2360.
As for the ABS light, it might depend on the year of your coach. I had a 2001 which did the light flicker once in awhile. WRV told me to cut in a relay in the wire going to the ABS light. I never got around to doing it. So don't know first hand if it would work or not.
You might want to join Alpine Coach Association which has one great perk, you can call (ACA pays him) Mark Harrop, who used to work for WRV, and has a lot of knowledge about Alpine. It's worth the price of membership.
Also please sign at the bottom of your posts with the year, length, door placement and slides. i.e. 2001, 36 FDDS, 2006, 40 FDQD etc.
This helps with replies from like owners.
2004, 40 FDTS