starting at the ignition switch going down the steering column. Next is an ignition switch. from there it goes to the selinoid. Inbetween the celinoid and the ignition switch, just above the celinoid is two fusable links.
There is a relay between your ignition switch and the starter though. Check in the driver's side fender well above the fender skirting. You will find an inline relay.
I have the 6 cylinder inline diesel, the starter is located below the floor board.
It is wired inline with the Crank wire going from the ignition to the starter solenoid located on the starter. Clutch up --> open switch (no start); Clutch down --> closed switch (start) Very basic for this year of truck.
There is not a fusible link between the alternator and starter. There is a regulator on the alternator. The starter is directly connected to the battery, as is the alternator.
There are many fuses and relays in that vehicle, we need to know which one you are looking for.
zIt is inside the fuel tank of vehicle. Check inline gas filter first.
There is an I4 (inline 4 cylinder) motor and the ever popular 4.3 liter V6.
You can jump start an older vehicle like this by shorting out the starter and solenoid with a screwdriver being careful to use one that doesn't ground you. You must have the vehicle switch to on. If you cannot get the vehicle to switch on you can hotwire the wire to the distributor to the battery. Not the safest way but in an emergency. A better way is to get a remote starter switch and wire it to the starter per its instructions. This is not to be confused with one of the newer remote starters which must be patched into the vehicles ignition and fuse box. You can also wire an ignition switch, preferably with an inline fuse, to the starter as well. This is a DIYer so if you have no electrical/mechanical training or experience then I'd get someone to help you. Good luck.
The 2003 Lexus IS300 uses a 2JZ-GE inline-6 Toyota engine, and has 6 ignition coils (coil on plug).
on the 4L inline 6 engine it is right above the oil filter on the bell-housing
IF YOUR MODEL HAS AN INLINE STARTER RELAY (BIG BLUE IDENTIFIED IN ENGINE ROOM) IT MAY HAVE FAILED. IF NOT THEN CHK FOR POWER AT STARTER, IF IT HAS POWER THEN STARTER IS BAD.
If the inline fuel pump can deliver a constant 9 to 13 psi it should work. Wire it to the original fuel pump wiring harness and mount it as close to the fuel tank as possible.