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Mazda Forum - Mazda Enthusiast Forums (https://www.mazdaforum.com/forum/)
-   Mazda CX-5 (https://www.mazdaforum.com/forum/mazda-cx-5-54/)
-   -   Drawing power from battery at idle (https://www.mazdaforum.com/forum/mazda-cx-5-54/drawing-power-battery-idle-47667/)

Gerald Mucci 07-10-2021 05:56 PM
Originally Posted by Callisto (Post 196450)
You DO NOT connect any accessory directly on the alternator battery lead of a ECU/ECM alternator output controlled charging system.

Even the starter factory is first supplied directly from the battery and a piggyback lead to the alternator.
Your ECU in the MAZDA can not effectively adjust the charging rate of your alternator..... so I am not sure if you would damage your Alternator ,ECU or battery maybe all 3? There are some thing electrical you just don't cheat on!
Still no direct answer to a direct question.

Callisto 07-10-2021 06:19 PM
Originally Posted by Gerald Mucci (Post 196452)
Still no direct answer to a direct question.
When you add none factory electronics you either piggy back an existing circuit after you verify it will support the additional load (must test for both heat using a digital temperature gauge and also the ohms with all the devices at maximum demand) or you connect directly to the batter(always a better choice).

Gerald Mucci 07-13-2021 03:27 PM
Thanks. The battery it is, then. I expect the DC to DC unit (10 amp, 12 to 48 volts) tomorrow. I'll check back with results, only if I don't fry something.


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