Noisy relays?

[scottdm]

I probably have over sensitive hearing, but am noticing the intermittent sound of relays when driving my '18 Expedition Limited. I can hear a relay click near the headlight switch when the auto headlights turn on around dusk. I can also hear a relay periodically over on the passengers side and assume it's related to HVAC functions as things cycle on/off.

Anybody else have a similar experience? Guess I need to turn up the radio! Most other vehicles I've had in the past seemed to have relays placed under the hood vs in the cabin, I assume due to the noise issue.

 

[benyl]

The ASS has a loud relay on the passenger side dash.


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[scottdm]

The ASS has a loud relay on the passenger side dash.


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Ya lost me.... Wasn't sure if it was an attempt at humor or an acronym I'm not familiar with. Perhaps its the seat heaters cycling or the heated steering wheel cycling....

 

[Squark]

He's talking about the auto start/stop system. I've noticed the relay sound with that as well. I also have a click that sounds just like a relay somewhere near my rear-view mirror, but I think it's just a rattle. I can't figure it out, though.

 

[aggiegrad05]

I don't ever hear any relays from the ASS or anything else. No clicks whatsoever.

 

[scottdm]

He's talking about the auto start/stop system. I've noticed the relay sound with that as well. I also have a click that sounds just like a relay somewhere near my rear-view mirror, but I think it's just a rattle. I can't figure it out, though.

Gotcha. Yeah, I disabled my auto start/stop via ForScan within the first week of ownership. Interesting to learn the new sounds in the vehicle and what's normal, etc.