![]() ![]() However, there may be some instances where you’d like … Subaru Forester: Flashing Check Engine Light Diagnosis. If all of this is above your abilities (a man has got to know his limitations), you might be further ahead to just get a used unit (test it) or get a new one.Subaru eyesight off and check engine light on. Regardless of which way you do the project, hook a 12 volt battery up to the wire harness of the motor, to be be sure it works before putting the unit back into the car. Then I was able to spray white grease into the hole to lube the shaft. In the past I've put one or two units into a drill press, and have drilled just part way through the final drive case till just touching the steel drive shaft without drilling into it. If so, see if you can drill into the case where the final drive shaft exits the case. Maybe it won't be possible to disassemble the unit. If you can get it apart, clean and relube all interior parts with grease and put it back together. If rivetted, determine if you can drill or grind the ends off of the rivets, and if so, whether you'll be able to drill through the body of the unit edges to put it back together using small bolts where the rivets were. Some are held together with small screws or bolts, some are rivetted. At this point you'll be able to judge whether you can get the gearbox open to take the unit apart. Its not rocket science to remove the rear deck interior panel (just pull the plastic plugs, any visible screws, and then just pull the panel straight off), disconnect the wiring harness to the wiper motor, unbolt the motor assemble and remove it from the tailgate. Lift up the plastic cover where the wiper arm comes through the tailgate, remove the nut on the end of the shaft and pry the wiper arm off. If the unit still moves, you can usually free the shaft up, relube it and get many more years out of it. As water and time and lack of use add up the 2 metals corrode, start to slow down the shaft's speed to which the wiper arm is attached, and eventually will seize the shaft altogether. The body of the units is usually a cast alloy material while the final drive shaft to the wiper arm is usually steel. Use it or lose it applies to these motors. I've done a number of them over the years and almost always for the same reason, their lack of constant use and the way in which they are made. This is typical of rear wiper systems as they age. ![]()
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