Electrical problems can be the hardest thing to find. I've had a
couple of electrical problems that weren't "normal" like a bad ground,
Once on a mid '80's GM product I kept blowing fuses on the turn
signals a couple weeks after I bought the car. I checked both ends of
the car for grounds, etc. but to no avail. So I began to remove the
door sills on the left side of the car where the wires ran to the
back. What I found was staples thru the plastic left rear door sill
in a effort to hold the carpet in place. However, the staples went
into the wiring as well causing a short across from one wire to the
next, or a bad ground and blowing the fuses. I asked myself, why
now? Why did it decide to show up after a couple of weeks? The only
thing that I could summarize is that my little girls were stepping on
the sill when entering the car and drove the staples down into the
wiring. Of course this had been a bad fix at the dealership to begin
with and the staples should not have been there in the first place.
Another time in a mini van the rear gate wiper would come on and off
by itself. Trying to find the fix for this one was driving me nuts.
By chance I replaced the battery before winter set in. I like to have
a good battery in the winter. And guess what? The problem no longer
Bad batteries can cause many strange electrical problems. Many
times the repairs on a car are usually the simple things. So might I
suggest checking the age of your battery. If it's over 3 yrs old have
a mechanic give it a good testing, and not just for draw down. If
it's much older than 3 yrs replace it with a good brand name battery
like interstate and not some walmart or other dept store off brand.
My two cents worth. f.b.