May be you already have checked but I will start with Battery, check the voltage on it. If you get the 12v then move on to Fuses.
Could be a bad ground, broken cable. It could be no. of things but Start with basics like battery, fuses etc.
87 420 SEL
Looking for a nice mid 80's MB diesel.
87 BMW 528e (Sold)
99 TOYOTA 4Runner
1989 Honda Accord (Sold)
1988 Honda Accord (Total)