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Why do my lights and alternator gauge dip when it is cold out?
When the engine has been sitting overnight or for any length of time in cold weather a sensor tells the manifold heater relays to send current to the manifold hearter body.
This current draw is considerable and you will see the lights and alt. gauge take large dips on and off accompanied by some "clunking" as the relays kick in and out. That is normal.
The temperature of the intake air will determine how often and how long this heating cycle will run.
Pastor Bob...
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