Key issue is only 3.3V at fuel pump relay trigger instead of 12V. This prevents relay activation. Trace the wire feeding relay pin 86 to find voltage drop. Check for bad connections, corroded grounds, or damaged wiring between power source and relay.
Most 1996 Ford F53 hydroboost units do require a check valve ball in the accumulator assembly. Operating without one can cause accumulator failure and brake system damage, even if the system currently works.
Injector issues cause misfire and rough running. Diagnose by scan codes and swap test. Clean or replace as needed.
1996 Newmar Mountain Aire quality diesel pusher likely on Spartan chassis. Focus maintenance on age-related components.
Your intermittent check engine light on the 1996 F530 460 V8 is likely caused by a failing sensor, loose connection, or intermittent fault that's not staying active long enough to be easily diagnosed. The most common culprits are the oxygen sensors, mass airflow sensor, or corroded wiring connections.
Ford motorhomes typically use the 4R70W, E4OD, or 4R100 4-speed automatic transmissions depending on year and engine. The 4R70W is most reliable for lighter duty, while the E4OD/4R100 handles heavier loads better.
For 1996 Ford 460 FI engines in RVs, the correct serpentine belt is typically Gates K060885 or Dayco 5060885. Always verify by measuring your current belt or checking with Ford parts using your VIN for exact specifications.