Go to Autozone.com and look under repair info. This should get you going in the right direction.
Disconnect the negative battery cable first, then positive cable. Remove the red angle connector plug from the relay. Note what cables go to each stud on the relay, then remove the two nuts. Remove the two screws that hold the relay to the sidewall. Clean the relay ends of the cables while they're loose. Install the replacement relay, correct orientation is determined by the screw hole pattern, and reconnect cable ends. Be careful not to over torque the nuts - you're working against the plastic shell of the relay, and could crack it. Reconnect the relay control wire to the upper small screw stud. Aftermarket relays (e.g., AutoZone Duralast) have two terminals, labeled "S" and "I". The "I" is not used on the Bronco II (and other Fords). Reconnect battery cables, positive first.
Follow the + battery cable should connect to the starter solenoid (relay)
On top of the starter - looks like a juice can
remove batt. cable from starter(its not wired to batt so has no power) remove 2 1/2 bolts remove starter
ckeck the solenoid on the passanger side front fender
the ground wire running from the starter solinoid to the starter sounds to be bad
8.25 fuse... good luck finding one, though
its located where the tranny bolts up to the motor. disconnect the three wires from the starter, then take the three bolts out of the starter and pull it out. just remember where the wires go!!
check your wiring,also check to see if theres power leaving the relay.
list of fuses for 1989 bronco 2
by your clutch pedal but far left attached to your inere wheel well
The starter relay should be under the hood or under the dash depending on if you have had a swap or not. Another cause that will relate to a stater relay would be the 12 volt main relay. If your car cranks but has no spark then theres a really good chance your main relay is bad or is going out.
IT'S ON THE RIGHT SIDE INER FENDER, NEXT TO THE BATTERY.