Rover45 rover 45 turn ingiton on ingition lights go dim wont start s/motor and battery earth strap all ok help wireing all ok wont start with tow timeing belt ok

think the wire to the starter motor is damaged ?? try turning ignition on and running a wire from + on the battery to the small wire on the starter motor ?? and remember do not leave the key in with the door open as this will activate the immobilisor ,open the window ?,Seem to remember their is a relay for the starter motor in the power distribution box under the bonnet maybe the low side of the circuit in this relay has burnt out causing the short who knows ,with my head under the bonnet i would sort this in minutes as these cars are quite simple but the better ones had honda engines

Try turning engine over with the head lights on, do the head or dash lights dim? Check earth straps, eg. battery to chassis, engine block to chassis, battery to engine block, (may not have battery to engine block), then check starter solenoid/relay and motor, then Check all power fuses, and fuse relays.

From the description you have posted I a summarizing that the engine will not turn when the starter switch is activated , firstly place the vehicle in gear and make sure it has not seized by rocking back and forth( an obvious thing you may think but many miss the obvious ) if the engine is free check your battery connections most notably your body to engine earthing strap and Battery to earth strap . If this is secure and free of corrosion remove the wires from the starter motor solenoid place a bulb across the wires and try the ignition switch if the bulb lights the fault is not there,if not the fault lies in the circuit from your switch to your starter solenoid . Most times I have found the reason is earth strap related either battery side to bodywork or to engine.

it sounds like starter motor ot the wiring to the starter motor. iff they are both ok check the earth strap going to the engine and the gearbox

if this helps let me know

cheers
mike

SOUND LIKE FAULTY STARTER SOLENOID OR STARTER MAKE SURE BATTERY CABLES AND BATTERY POST TIGHT CLEAN TURN OFF RADIO FIRST BEFORE REMOVING BATTERY CABLES. TO KEEP FROM LOSING CODE. USE A MEMORY SAVER IN CIGARETTE LIGHTER BEFORE REMOVING BATTERY CABLE.BMW WARNING YOU BECAUSE YOU SHUT DOWN PCM VECHICLE HAS TO BE TOWED IN AND REPROGRAMED .IF ALL IS GOOD YOU COULD HAVE PROBLEM IN ELECTRONIC IMMOBILIZER CONTROL OR FAULT IN THE TRANSMISSION CONTROL UNIT.

Might be really simple like a battery terminal connector is loose. Check the connectors are tight.. if not tighten the clamps. If the terminal connector is loose you may find that you also have difficulty in starting. If terminal connectors are on tight but still have the issue then check the connections to the alternator (clean and tight) and likewise the earth return strap between the engine to the car frame. If you have access to a voltmeter the battery, with the engine off should read 12.4 volts between the terminals and 14.4 volts when the engine is running.

renew the battery and starter motor ,also check the earth strap from the battery to the engine first though ,stick a jumper lead on it from battery negative to engine block and try it

There is a few things to check ,,, if it a manual gear box put in 2nd gear and rock it forward and reverse and open the bonnet and check to make sure the engine turns a little bit {it dose) ok take out of gear h/brake/on, Turn on Head lights then turn key to Start do the lights go very dim or out ..if yes then the battery is lower than 12 volts and needs a jump start or the Alternator isent charging it or battery lead on engine Earth lead loose , check all these first and then get back to me as there is a lot more to check
Let me know how you get on Ron

check the large relay in the fuse box and push it down it works a number things

Sounds to be a loose or corroded wire/s at either starter motor or at battery fusible links.
Also check the earth strap (Cable) between engine and bodywork.
Hope this helps, MMP