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roybelding
roybelding, ASE Certified Technician
Category: Mercury
Satisfied Customers: 6040
Experience:  35 years of retail operations on all vehicles
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My son has a 2002 Grand Marquis. Replaced battery and

Customer Question

My son has a 2002 Grand Marquis. Replaced battery and starter. Try to start the car wont turn over and it drains the new battery down
Submitted: 1 year ago.
Category: Mercury
Expert:  roybelding replied 1 year ago.

good afternoon my name is ***** ***** I will assist

does the starter motor turn the motor or does it crank and not start??

do all the lights on the dash light up with the key on???

Roy

Customer: replied 1 year ago.
it barely turns. the lights dash all come on windows will go up and down.
Customer: replied 1 year ago.
The last time he charged the battery is just clicked.
Expert:  roybelding replied 1 year ago.

do you have a voltmeter to do some checks???

Roy

Customer: replied 1 year ago.
No, but I may be able to get one.
Expert:  roybelding replied 1 year ago.

ok, I suggest you get one so we can do some checks to see why it wont crank right

Customer: replied 1 year ago.
once we get it, what do we do?
Expert:  roybelding replied 1 year ago.

get back to me and we will do some testing

Roy

Customer: replied 1 year ago.
ok thank you.
Expert:  roybelding replied 1 year ago.

you bet. will be here.

Customer: replied 1 year ago.
Sorry son had to work later last night. Have the voltmeter. he is not able to get it to read the battery or the starter.
Expert:  roybelding replied 1 year ago.

ok, start by charging the battery we need it up to 12.6 volts

Roy

Customer: replied 1 year ago.
ok
Expert:  roybelding replied 1 year ago.

it will take a while I will be on and off and will be checking my mail

Roy

Customer: replied 1 year ago.
Sounds good he had already started charging
Expert:  roybelding replied 1 year ago.

good, got some errands to do and will be back

Customer: replied 1 year ago.
Battery is where it needs to be
Expert:  roybelding replied 1 year ago.

ok, what is the battery voltage???

Roy

Customer: replied 1 year ago.
12.75-13
Expert:  roybelding replied 1 year ago.

ok, have someone inside the car and turn to start and watch the voltage

Customer: replied 1 year ago.
on battery or starter?
Expert:  roybelding replied 1 year ago.

on the battery first. we will load test the battery first

Customer: replied 1 year ago.
it drops .18 to 12.3 starter clicks
Expert:  roybelding replied 1 year ago.

ok, good. now, take your voltmeter and put the red lead on the positive of the battery and the black on the heavy red wire on the starter solenoid. try cranking it again and see if there is a reading on the voltmeter

Roy

Customer: replied 1 year ago.
Had 12.54 and starter just clicks
Expert:  roybelding replied 1 year ago.

if you read 12 volts with that reading, it means you have a 12 volt drop between the battery and the starter. this means the cable is no good. it is like you have next to 0 volts getting to the start solenoid.

you need to do the ground side as well. red lead to negative and black to the case of the starter

Roy

Customer: replied 1 year ago.
red on the negative on the battery?
Expert:  roybelding replied 1 year ago.

thats correct and the black on the case of the starter motor. then try and start and tell me the reading

Roy

Expert:  roybelding replied 1 year ago.

battery positive

Expert:  roybelding replied 1 year ago.

battery negative sorry

Customer: replied 1 year ago.
no readings at all and starter clicks
Expert:  roybelding replied 1 year ago.

good, then there is no voltage drop on that side.

replace the positive battery cable from the starter solenoid to the battery positive. if you did the check correctly, you are loosing all your voltage in the bad battery cable.

Roy

Customer: replied 1 year ago.
Okay, they're working on that now.
Expert:  roybelding replied 1 year ago.

ok

Expert:  roybelding replied 1 year ago.

how are you making out

Customer: replied 1 year ago.
not to good. put a new battery lines in and still wont turn the motter
Expert:  roybelding replied 1 year ago.

then you did not do the one test correct.

battery was good. you indicated 12 volt loss from battery to starter on the positive cable. if that reading was not correct then you need a starter motor

Roy

Expert:  roybelding replied 1 year ago.

how are you making out

Roy

Customer: replied 1 year ago.
Turned out to be the negative ground. Car was running. Serpentine belt snapped. New belt put on and belt pully seized up. got that working, tried to replace, going to have a new bearing pressed in. his grandpa came to help him
Expert:  roybelding replied 1 year ago.

glad you found it.

roy

Customer: replied 1 year ago.
thanks
Expert:  roybelding replied 1 year ago.

understanding voltage drop is a difficult concept if you never did it before

Roy