There is no 1991 VW Rabbit.
You can find the 1991 Nissan starter motor relay switch in the fuse box. The starter motor relay switch will be in the third column, second from the bottom.
replace starter
as with any starter motor just look for the gearbox and it will always be connected somewhere to that.
Front of the transmition
In a 1991 Mazda MX-6, the starter solenoid is typically mounted on the starter motor itself, which is located on the lower side of the engine near the transmission. To replace it, first disconnect the battery to prevent electrical shock. Then, remove the starter motor by unbolting it from its mount, disconnecting the wiring harness, and then replacing the starter solenoid. Reattach the starter motor, reconnect the battery, and test the system for proper operation.
you have to take the starter out of the car and dismantle it.....it's an integral unit
underneath engine, bolted on passenger side of engine,
The starter motor is located between the transmission and the engine which engages the starter clutch with the flywheel, which rotates and starts the engine.
Pull the motor out of the car and change it.
Probably the starter, have someone turn the key to the crank position while you gently tap the starter with a hammer or bar. If it starts change the starter. If not try shorting the starter solenoid to see if that works.
Same answer as: "How do you replace a starter on a 92 Geo Prism LSI or GSI?" at this same site.
I use a starter solenoid from a 1991 - 1995 Toyota Pickup on my 1998 FLHT Evo... and a fraction of the cost from Harley.