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Username Post: 56 Belair Ignition Switch Question        (Topic#366601)
IndyTom 
Member
Posts: 116

Loc: Rockville, VA USA
Reg: 01-14-02
10-05-21 05:25 PM - Post#2828581    

On my 56 Belair original ignition switch, the ACC/Connector has a pink wire connecting to it. The pink wire branches off and goes over to the flasher connector as well as to the gas gauge and temperature gauge. With the ignition switch in the "off" position, I checked using my multi-meter to see if the pink wire is grounded/shorted at the flasher connector, the multi-meter indicates the wire is grounded. Could a ground condition be from either the gas gauge or the temperature gauge or does the ignition switch ground things when it is in the off position? I don't know enough about the ignition switch in the off position. Thank you for your help.



 


65_Impala 
Very Senior Member
Posts: 4818

Reg: 12-29-02
10-07-21 09:41 AM - Post#2828718    
    In response to IndyTom

Test with the flasher pulled. The signal bulbs are likely causing the ground you are seeing through the flasher.



 
IndyTom 
Member
Posts: 116

Loc: Rockville, VA USA
Reg: 01-14-02
10-08-21 05:16 PM - Post#2828822    
    In response to 65_Impala

Found the issue. I unknowingly pulled the connector down between the dash wire harness and the steering column wire harness (the original). The exposed brass wire crimp rings on the terminal of the lite blue wire made contact with the grounded steel brace of the steering column. This burned the turn signal flasher.

The connector has been taped and wire tied up to prevent this from happening again. Chevrolet did not tape this connector from the factory. Once this was completed, I installed a new flasher and all turn signals worked normally.

Back to the pink wire on the accessory tab of the ignition switch. In the off position, the ignition switch must ground the pink wire. When the ignition switch is on, the pink wire then becomes the 12 volt source to the turn signal flasher (including the turn signal lamps at each corner), fuel and temperature gauges.





 
65_Impala 
Very Senior Member
Posts: 4818

Reg: 12-29-02
10-11-21 04:57 PM - Post#2828995    
    In response to IndyTom

How are you measuring "ground"???

Every "thing" that is powered by the pink wire will ground it through the "thing" when the ignition is off. Lights, radio, gauges etc all add a load to ground. So, the wire might appear to be grounded depending on how you are measuring it.





 
IndyTom 
Member
Posts: 116

Loc: Rockville, VA USA
Reg: 01-14-02
10-12-21 03:45 PM - Post#2829038    
    In response to 65_Impala

I put one lead from the multi-meter on the steel brace above the steering column. The brace is bolted to bottom of the dash and riveted to the firewall. The other lead went into the pink wire side of the flasher connector.

So electrically speaking the ground lead is near the ignition switch. Comments or suggestions 65-Impala?



 
65_Impala 
Very Senior Member
Posts: 4818

Reg: 12-29-02
10-12-21 06:02 PM - Post#2829051    
    In response to IndyTom

And the meter read?



 
IndyTom 
Member
Posts: 116

Loc: Rockville, VA USA
Reg: 01-14-02
10-16-21 01:48 PM - Post#2829274    
    In response to 65_Impala

With the ignition switch on and the meter on the 0-20 dc volt range. I measured 12 volts. I don't remember the decimal value.

With the ignition switch off and the meter selector in ohms position the resistance read zero.



 
Rick_L 
Member #409
Posts: 27914
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
10-16-21 05:29 PM - Post#2829306    
    In response to IndyTom

No terminals on the ignition switch should be grounded, ever.

Disconnect each wire in question, one at a time at its terminal, to discover which one is grounded.



 
65_Impala 
Very Senior Member
Posts: 4818

Reg: 12-29-02
10-17-21 07:31 AM - Post#2829340    
    In response to IndyTom

Well, the switch itself doesn't connect the wire to ground. One of the loads must be appearing to be a short when it is off. Some stuff has a really low resistance when it isn't powered. If it's working then it's not a short. I wouldn't worry about it any more, you probably already aren't.



 


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