Diagnosis/symptoms of Sprint auto inhibitor switch failure

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Matt Cotton
TDC Oxfordshire Area Organiser
Posts: 493
Joined: Sun Oct 08, 2006 4:32 pm

Diagnosis/symptoms of Sprint auto inhibitor switch failure

#1 Post by Matt Cotton »

Hello all.

Can anyone enlighten me as to what you would expect if the inhibitor switch had failed on an automatic?

A friend has asked me this question as he has an auto Sprint which was running fine until recently. Despite changing points, condenser and various checks it will crank, but not fire.

My response was "is it the inhibitor switch?" however I then wondered if this prevents the cranking also?

Luckily I haven't yet experienced this with my own auto!

Any pointers or advice that I can pass on much appreciated. I'm sure I've read on here somewhere the art of bypassing the switch for fault finding.

MC.
Matt Cotton

TDC Oxfordshire Area Organiser.
TDC/TSSC group meeting - 3rd Tuesday of the month


1980 1500HL - OPD
1976 Sprint - SWU
harvey
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Re: Diagnosis/symptoms of Sprint auto inhibitor switch failure

#2 Post by harvey »

The inhibitor switch only stops it cranking in R,D,2,1. It should crank in P & N only. If it cranks it won't be the inhibitor switch causing the non-start.

Don't bypass it.
Currently over 35 years worth of fixing 35 boxes.
Hoping to reach 65 years worth of fixing 65 boxes.
dollyman
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Re: Diagnosis/symptoms of Sprint auto inhibitor switch failure

#3 Post by dollyman »

Does the Sprint have a ballast resistor Matt? Usual culprit.

Tony.
NOW A CLUB MEMBER 2017057 :bluewave:
Matt Cotton
TDC Oxfordshire Area Organiser
Posts: 493
Joined: Sun Oct 08, 2006 4:32 pm

Re: Diagnosis/symptoms of Sprint auto inhibitor switch failure

#4 Post by Matt Cotton »

Thanks gents. Yes I think it does Tony. I will pass the information on.

MC
Matt Cotton

TDC Oxfordshire Area Organiser.
TDC/TSSC group meeting - 3rd Tuesday of the month


1980 1500HL - OPD
1976 Sprint - SWU
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