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Hot!Husqvarna LTH 120

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James Harris
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2017/07/05 23:04:55 (permalink)
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Husqvarna LTH 120

97 HUSQVARNA LTH 120
12 HP Briggs and Stratton engine

No crank not responding at all

New spark plug
New starter
New solenoid
Has oil and fresh gas
Cleaned fuel float
Good battery



Test 1 Fuse test took red lead of multimeter and put into fuse holder and black lead to negative battery terminal online said should've gotten around 12.46 V and got zero

Test 2 keyswitch test took red lead and placed where red wire goes into the keyswitch black lead to the negative battery terminal should've got 12.54 V- key switch is good

Test 3 took red lead and put in the white wire from solenoid black lead to negative battery terminal got 12.54 V

Test 4 took red lead to white wire solenoid and black lead to black wire of solenoid with key switch off and on 0 V

Test 5 took red lead of multimeter to the black solenoid wire and took black lead to negative battery terminal should've gotten 12.54 V got 0 V

Went to take new solenoid off and try again with old solenoid and was going to use a socket to loosen terminals on the solenoid and got a spark so that should mean good solenoid correct?

5 Replies Related Threads

    Mikel1
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    Re: Husqvarna LTH 120 2017/07/06 00:51:42 (permalink)
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    Looking at the schematic battery positive cable goes to solenoid, small red wire goes thru fuse then to B terminal on ignition switch. You should have 12+ volts if you unplug ignition switch on that red wire connected to B terminal.
    If you do then reconnect and pull the small white wire from solenoid tab. Put your multimeter red lead on that white wire and multimeter black lead to negative on battery. You have to test this just like you would normally start it up, may need a helper. You should have 12+ volts when trying to start it.
    James Harris
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    Re: Husqvarna LTH 120 2017/07/06 15:02:46 (permalink)
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    I disconnected the red wire from the ignition switch and tested the B terminal and got 12.54 volts and tested the white wire with red lead and black lead to battery and got 12.54 V
    Mikel1
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    Re: Husqvarna LTH 120 2017/07/06 18:43:22 (permalink)
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    Sounds good, now take off small black wire to solenoid tab. Put multimeter red lead on that wire and multimeter black lead on negative battery terminal, measurement is in Ohms NOT voltage. You should be close to 0.00 Ohms may very a little with digital multimeter.
    If that is good reconnect and try to start it like you normally would, test starter side on solenoid post when key is turned, you should have 12+ volts. If you do not have 12+ volts then you need a new starter solenoid.
    James Harris
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    Re: Husqvarna LTH 120 2017/07/18 23:15:13 (permalink)
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    Did some test on some safety switches I am getting different readings on different wires see bottom of the post

    97 HUSQVARNA LTH 120

    No crank not responding at all

    New spark plug
    New starter
    New solenoid
    Has oil and fresh gas
    Cleaned fuel float
    Good battery



    Test 1 Fuse test took red lead of multimeter and put into fuse holder and black lead to negative battery terminal online said should've gotten around 12.46 V and got zero

    Test 2 keyswitch test took red lead and placed where red wire goes into the keyswitch black lead to the negative battery terminal should've got 12.54 V- key switch is good

    Test 3 took red lead and put in the white wire from solenoid black lead to negative battery terminal got 12.54 V

    Test 4 took red lead to white wire solenoid and black lead to black wire of solenoid with key switch off and on 0 V

    Test 5 took red lead of multimeter to the black solenoid wire and took black lead to negative battery terminal should've gotten 12.54 V got 0 V

    Went to take new solenoid off and try again with old solenoid and was going to use a socket to loosen terminals on the solenoid and got a spark so that should mean good solenoid correct?


    PTO switch on 20 DC took Black lead to White wire and red lead to positive battery terminal meter read 12.56 took black lead to black wire on switch and red lead to positive battery terminal got 12.56

    Seat switch reads good 12.56v

    Red wire going under flywheel read 0 on meter
    Black wire going under flywheel reads 12.56


    Orange wire from key switch reads 12.56 on meter but orange wire from the other end of it reads 0

    Red white blue and gray wires coming from keyswitch read zero
    Mikel1
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    Re: Husqvarna LTH 120 2017/07/29 12:22:39 (permalink)
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    Did you do the test in my earlier post on the small black wire in ohms and the other test I asked?
    Your bouncing around makes this confusing ,this is not that complicated.
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