Out Go the Lights
Q: My 2000 Silverado's dash lights occasionally go out, killing the speedometer and tachometer. This also causes the transmission to stick in third gear. Could the ignition switch be causing these problems? The truck has 113,000 miles on it.
A: Good call. The ignition switch has caused some grief for several GM trucks. Symptoms include the instrument cluster going dead, the malfunction indicator lamp coming on, and the transmission becoming stuck in third gear. Check the 10-amp ignition fuse labeled #5 in the fuse block, located at the lower left-hand side of the instrument panel. If there's no voltage applied to the fuse with the ignition switch in the run position, the problem is most likely the switch. But keep in mind that a glitch in an aftermarket remote starter or alarm system can cause the same condition. If there's power to the fuse from the ignition switch, and the fuse is good, then there's probably a break in the circuit after the fuse. The ignition switch itself costs about $100, and replacement is a somewhat involved procedure that requires disassembly of the steering column.
Super Duty Steering Fix
Q: I have a crew-cab, shortbed 4WD 2005 Ford F-250 Super Duty with the Power Stroke diesel and automatic, which I purchased new. When one of the truck's wheels hits a bump, manhole, pothole, or uneven pavement, there's serious feedback in the steering wheel. My dealer couldn't find anything wrong, yet Ford later issued a service bulletin. After taking it in for the necessary upgrades, including a new steering wheel, there's no notable difference in feedback. I repeatedly brought the truck back to the dealer, which has been cooperative, but with each visit tightened the steering gear until my Ford became undrivable. I returned again, and they loosened the gear, but the feedback is still there.
A: That's a surprising problem, considering the ride, handling, and maneuverability improvements provided by suspension upgrades to the 2005 Super Duty. On 4x2 and 4x4 models, Ford did away with the front leaf springs, replacing them with coil springs and a superior steering configuration. Our experience with the new model has been positive. Technical service bulletin 04-26-1 gives step-by-step instructions for evaluating and correcting steering-wheel oscillation over bumps on certain 2005 Super Duty trucks. Part of the procedure is to replace the steering wheel, inspect the steering damper, and adjust the steering gear (box). First and foremost, check and double-check the tire pressure. Too many people set air pressure at the tire's maximum limit, which is printed on the sidewall. Adhere to the manufacturer's recommended tire pressures listed on the tag within the driver's doorjamb, fuel door, or glovebox (always check pressure when the tires are cold). Ford engineers calculate these numbers to provide optimum ride, handling, tire wear, and safety, even while carrying a maximum-rated cargo load. Higher pressures may give a stiffer ride with steering feedback. You also may want to drive a similar truck to ensure you're not experiencing a normal ride characteristic. After that, make sure the technicians executed every phase of the TSB. They also should be discussing the problem with Ford technical assistance. I'll keep my eye out for any new service bulletins related to the condition.