HELP !! MG Midget start problems
Author
Discussion

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 13th August 2012
quotequote all
Hello. My 1500 MG Midget was starting and running fine 2 days ago however the battery was dead so I removed it and charged it up , reinstalled it today and nothing . I have checked all terminals fuses ect and no problems there . All the electronics in the car work lights ect, however the starter motor is not evan making a noise . I tried jumping it off my other car incase the battery was compleatly nakard and still nothing . I turned the starter motor by hand and its not stiff or seized . Im all out of ideas now can anybody help please ..

john2443

6,540 posts

240 months

Monday 13th August 2012
quotequote all
You've dislodged a wire while getting te battery in and out.

1) Low amp side; Starter solenoid doesn't get the message from the ignition key. Use a wire from the battery to the signal/small input of the solenoid and see if that starts it.

2) High amp side; Thick wire to starter motor isn't live, bad contact with battery or starter. Use a test bulb at one end then the other, put a jump lead across the big terminals of the starter or from battery to starter. Confidence pill required for this!

3) Earth. Earth lead is no longer joined from the engine to chassis (unlikely) or earth lead from battery to body/chassis not firmly connected. It might be well enough done to give the small amount of power for lights etc but not enough for the shed load of amps needed for the starter.

I would say it's unlikely the starter motor as you havn'et touched that.

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 13th August 2012
quotequote all
john2443 said:
You've dislodged a wire while getting te battery in and out.

1) Low amp side; Starter solenoid doesn't get the message from the ignition key. Use a wire from the battery to the signal/small input of the solenoid and see if that starts it.

2) High amp side; Thick wire to starter motor isn't live, bad contact with battery or starter. Use a test bulb at one end then the other, put a jump lead across the big terminals of the starter or from battery to starter. Confidence pill required for this!

3) Earth. Earth lead is no longer joined from the engine to chassis (unlikely) or earth lead from battery to body/chassis not firmly connected. It might be well enough done to give the small amount of power for lights etc but not enough for the shed load of amps needed for the starter.

I would say it's unlikely the starter motor as you havn'et touched that.
Tried 1) no joy nothing so shouldnt be that right

Tried 2)from battery to starter bang spark and flashed up like a dream . so its a bad contact then . ive checked all contacts and i cant seem to see any that are loose ect .

stressing .. i cant see anything different with the cables gave um all a tug test and they seem fine nice and tight

john2443

6,540 posts

240 months

Monday 13th August 2012
quotequote all
Try jump lead from one big terminal on the solenoid to the other. If that works then it's the solenoid. Unlikely cos nothing has changed there.

Then try each lead in turn using a jump lead to replicate it until you find the bad one - batt pos to solenoid in, solenoid out to starter, batt neg to engine (is there a good contact between the batt post and the clamp that's on it?


Hooli

32,278 posts

229 months

Tuesday 14th August 2012
quotequote all
From memory the solenoid is down the bulkhead on the nearside of the car, it's be worth checking you've not lost a wire off that. I seem to recall the LT side is just a normal push on spade connector.

auxilarygrub8

Original Poster:

33 posts

171 months

Tuesday 14th August 2012
quotequote all
Went across the terminals on the solenoid and it started up . So could it be the solenoid all the spade crimps are in place and solid on it so no obvious loose wires . Just don't wanna change the solenoid and it be a ignition problem or something .

Hooli

32,278 posts

229 months

Tuesday 14th August 2012
quotequote all
Try a test lamp or volt meter across the LT side of the solenoid, that'll tell you if your getting power from the ignition switch. It's also worth putting 12v direct to the LT side of the solenoid to prove if it's working or not.

john2443

6,540 posts

240 months

Tuesday 14th August 2012
quotequote all
^ This.

Then depending on the outcome, check the ign switch.

auxilarygrub8

Original Poster:

33 posts

171 months

Friday 17th August 2012
quotequote all
Quick update .I put power directly on the LT side of the solonoid . no joy . So Purchanced new solonoid and installed turened the key and.......... still nothing NOOOOOOOO . Im all outta ideas now . I thought it was that for sure . there definatly power on the ignition as testers read 12.2 v so is it on the WR wire between the ignition to the solonoid, i realy dont no now .

john2443

6,540 posts

240 months

Friday 17th August 2012
quotequote all
Is the solenoid properly earthed? Probably just be the bolts that hold it to the car.

When you put power into it from the thin wire from the ign it has to go out somewhere in order to go back to the battery, try running a wire from the battery earth side to the solenoid bracket then turn the key - may need an assistant or very long arms!

auxilarygrub8

Original Poster:

33 posts

171 months

Friday 17th August 2012
quotequote all
what a Idiot i feel . solonolid wasn't earthed properly . all good now though yay . glad it want a bigger problem thanks for your help

john2443

6,540 posts

240 months

Friday 17th August 2012
quotequote all
auxilarygrub8 said:
what a Idiot i feel . solonolid wasn't earthed properly . all good now though yay . glad it want a bigger problem thanks for your help
Glad you got it sorted, invoice in the post wink