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No Cranking

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No Cranking #1
Lancastorshire Kyle M St.Augustine, FL, USA Sign in to contact	Topic Creator (OP) Jul 22, 2014 03:56 PM Joined 10 years ago 29 Posts

I cleaned all the connections under the hood of my 77 mgb yesterday trying to fix one problem (the power would intermittently turn off to the gauge cluster, wiper motor and fuel pump) when I went to start it afterwards the starter motor would not activate at all. I tested the solenoid and it gets at least 12v from feed to ground, the two terminals are also sharing at least 12v. The terminal that feeds into the starter to the starter ground is getting no power or maybe 0.05v. This is my daily driver so I need to get my mobility back stat. If anyone knows where the culprit might lay I would love to here from you, thanks
Kyle.

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Re: No Cranking #2
Zacklanduyt Zack Landuyt South Bend, IN, USA Sign in to contact 1980 MG MGB "The B"	Jul 22, 2014 03:58 PM Joined 11 years ago 312 Posts

Relay... check the connections at the relay, also could have a faulty relay and that could have been your issue all along... or possibly ignition switch... do you have a wiring diagram?

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Re: No Cranking #3
Lancastorshire Kyle M St.Augustine, FL, USA Sign in to contact	Topic Creator (OP) Jul 22, 2014 04:10 PM Joined 10 years ago 29 Posts

Yes I have a diagram for my year, can I by pass the relay with direct connections to test it, is there a test for the ignition switch. Thanks for such a fast reply.

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Re: No Cranking #4
Dave W David Wilhelm Willits, CA, USA Sign in to contact 1963 MG MGB 1970 MG MGB GT "New Girl"	Jul 22, 2014 04:11 PM Joined 9 years ago 2,626 Posts

i know its a bit late but i drove a 76 as my daily for many years and got into the habit of doing a little and then testing. that way when i screwed up as i often did i didn't have to look very far!
yes get a diagram and chase that circuit. must have messed one up!

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Re: No Cranking #5
notyet-MG Steve LaPaugh Newport News, VA, USA Sign in to contact 1977 MG MGB	Jul 22, 2014 04:20 PM Joined 16 years ago 580 Posts

Check ground is good. Tighten connections at battery. I had a lot of corrosion on the end of the connection between batt. Cable and the connector. It kept shorting out. Once I stripped the cable and made new connection it was ok.

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Re: No Cranking #6
tomkatb Larry Baygents Dayton, Ohio, USA Sign in to contact 1963 MG MGB	Jul 22, 2014 06:38 PM Joined 19 years ago 6,502 Posts

Clean the battery terminals and connectors. Common issue.

L.W.(Larry)Baygents
63B
77 Spit

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Re: No Cranking #7
Lancastorshire Kyle M St.Augustine, FL, USA Sign in to contact	Topic Creator (OP) Jul 23, 2014 01:06 PM Joined 10 years ago 29 Posts

Thanks for the advice everyone I tend to over think the simple things.

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