The ignition relay on a 1988 Ford E350 (Fleetwood Tioga base) is typically located in the engine bay fuse/relay box on the driver's side firewall, or in a separate relay box near the battery. Some models may have it mounted on the firewall or inner fender well.
Holiday Rambler fenders can be sourced from REV Group parts department, RV salvage yards, or fabricated by fiberglass shops. The recurring detachment indicates a mounting flaw - reinforce attachment points during repair.
Since your ECU board is unrepairable and Ford/RV dealers won't help, try specialized ECU rebuilders like Module Experts or Solo Automotive Electronics, or search for used units on car-part.com with your exact part number 7C3A-12A650-DSC.
You can access cylinders 1 and 2 on the E450 V10 by carefully flexing wire harnesses, using flexible extensions, and working from underneath the coach. Remove the engine cover and air intake box first for better access without disconnecting major harness brackets.
On 1991 E350, battery ground typically terminates at engine block near starter or frame rail under battery. The fender tie is likely a routing point - continue tracing to find actual ground bolt. Clean to bare metal and use proper gauge cable for replacement.
Drill mounting solar Z brackets is more secure than adhesive, especially for larger panels. Use proper Dicor sealant on all penetrations. Adhesive can fail in extreme temperatures.
Check inertia switch first on 1994 Ford 460 - this cuts fuel pump power after impact and has reset button. Usually on drivers side kick panel. Also check fuel pump relay by swapping with similar relay. Do not rely on jumper wire long-term.
Park brake light on usually low brake fluid or switch stuck. Check fluid level immediately. Inspect for leaks if fluid low.
Yes, there are documented issues with premature front wheel bearing failures on 2018-2019 Ford F53 chassis motorhomes, often occurring between 15,000-30,000 miles. The failures are typically caused by inadequate lubrication, manufacturing defects, or overloading.
No spark usually caused by crank sensor, ignition module, or coil failure. Test systematically from sensor to coil.
F53 no start - check if it cranks first. Cranks but no start usually fuel pump, crank sensor, or ignition module.
Your 1995 F53 460 7.5L is stalling due to a failing ignition control module (ICM). Since you've confirmed the spare ICM fixes the problem, replace the faulty module and carry a spare for peace of mind while traveling.