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Ignition System Issue After Rebuild


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#1 Mini 360

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Posted 16 August 2020 - 06:49 PM

Hi there.

It's been aaaaaages since I've been on TMF but Project Trig is rising once again.

I've just gone to start the car after refitting the engine. I fitted a new battery which is showing perfect voltage and this was paired with a new earth strap from the engine to the bulkhead.

However I am only getting around 11-11.5v on the battery cable/starter solenoid terminal. I then turned the ignition on and got no lights on the dashboard at all, no clicking from the starter solenoid either. I retested the starter solenoid/battery cable terminal and it reads 0v.

All wiring and parts are same ones from when the car was last started so I am confident that these are not faulty.

Any ideas what may be the issue? I have no clue about electrics but can follow instructions well.

Edited by Mini 360, 16 August 2020 - 06:51 PM.


#2 cal844

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Posted 16 August 2020 - 07:07 PM

Welcome back buddy ?

Make sure the earth's are tight and then double check battery voltage at rest then during cranking, it should only drop to 11 volts.

Anything under 11.7volts will give issues.

Also make sure the battery is from a freshly delivered batch of batteries, I've had it where a 063 size battery that sat for 3 months on my mates garage shelf (it was a sale or return battery, they don't get charged before fitting in a vehicle) wasnt good enough to start the motor. A new battery from another supplier the motor started first turn


Cal

Edited by cal844, 16 August 2020 - 07:10 PM.


#3 Mini 360

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Posted 16 August 2020 - 07:21 PM

Make sure the earth's are tight and then double check battery voltage at rest then during cranking, it should only drop to 11 volts.

Anything under 11.7volts will give issues.

Also make sure the battery is from a freshly delivered batch of batteries


All tight

No ignition in order to crank. That's my issue.

Fresh battery.

#4 jime17

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Posted 16 August 2020 - 07:34 PM

My first act would be to re check the battery voltage then battery connections and the earth to the shell in the boot. Then I'd check the positive cable from battery to solenoid.

#5 Mini 360

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Posted 16 August 2020 - 07:37 PM

My first act would be to re check the battery voltage then battery connections and the earth to the shell in the boot. Then I'd check the positive cable from battery to solenoid.

Checked the battery multiple times and also checked against the earth to the boot floor. Both read good voltage consistently.

As above, battery cable to solenoid reads circa 11.5v.

Edited by Mini 360, 16 August 2020 - 07:59 PM.


#6 sonscar

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Posted 16 August 2020 - 08:20 PM

Take off the terminals from the posts and clean them then reassemble making sure the insulation is not trapped.It the post still has no power test on the spades or rings.Good hunting,Steve..

#7 jime17

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Posted 16 August 2020 - 09:23 PM

My first act would be to re check the battery voltage then battery connections and the earth to the shell in the boot. Then I'd check the positive cable from battery to solenoid.


As above, battery cable to solenoid reads circa 11.5v.
You said you retested it and it was 0v.

Edited by jime17, 16 August 2020 - 09:24 PM.


#8 Mini 360

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Posted 16 August 2020 - 09:28 PM

My first act would be to re check the battery voltage then battery connections and the earth to the shell in the boot. Then I'd check the positive cable from battery to solenoid.

As above, battery cable to solenoid reads circa 11.5v.
You said you retested it and it was 0v.
yes. With the key turned to ignition on.

#9 croc7

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Posted 16 August 2020 - 09:40 PM

Ignition switch/connection?

#10 Mini 360

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Posted 17 August 2020 - 03:55 PM

Ignition switch/connection?

I have separated the connector from the switch to the loom. The permanent live gets circa 11-11.5v through it.

#11 croc7

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Posted 17 August 2020 - 06:23 PM

 

Ignition switch/connection?

I have separated the connector from the switch to the loom. The permanent live gets circa 11-11.5v through it.

 

Ignition switch to starter solenoid voltage?  So the circuit from the ignition switch to the starter solenoid is sound?



#12 Mini 360

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Posted 17 August 2020 - 07:29 PM


Ignition switch/connection?

I have separated the connector from the switch to the loom. The permanent live gets circa 11-11.5v through it.
Ignition switch to starter solenoid voltage? So the circuit from the ignition switch to the starter solenoid is sound?
I think so. Put one probe in the permanent live, grounded the other one. Got the reading, so it's getting power to the switch.

The problem is as soon as I turn the key, I get nothing from any connection. Weird!

#13 Mini 360

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Posted 17 August 2020 - 07:32 PM

Here's what I have

https://flic.kr/p/2jxmBE9

https://flic.kr/p/2jxnHgP

https://flic.kr/p/2jxmBvS

https://flic.kr/p/2jxihyb

Middle connector on right is permanent live. That and connection below look to have minor corrosion. Still get strong permanent live reading though.

https://flic.kr/p/2jxnH9V

#14 croc7

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Posted 18 August 2020 - 01:00 AM

Ignition switch/connection?

I have separated the connector from the switch to the loom. The permanent live gets circa 11-11.5v through it.
Ignition switch to starter solenoid voltage? So the circuit from the ignition switch to the starter solenoid is sound?
I think so. Put one probe in the permanent live, grounded the other one. Got the reading, so it's getting power to the switch.

The problem is as soon as I turn the key, I get nothing from any connection. Weird!
If you have power into the switch and nothing going out (as in going to the starter solenoid or any other accessories ) when you turn the key, sounds like a bad ignition switch to me.

Edited by croc7, 18 August 2020 - 04:08 AM.


#15 Dusky

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Posted 18 August 2020 - 06:47 AM

11.5 is way too low. What voltage is your battery at?
It cant be a lot of things. Either bad connection the the solenoid or bad connection to the battery if the battery is fresh, wich I doubt it is.




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