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CdnGriff



Member Since: 27 Jul 2025
Location: Ontario
Posts: 7
Canada 1999 Defender 90 Td5 CSW Keswick Green
Heater blower voltage drop
Hey all,

When the fan is on "2" or full, my voltmeter takes a serious dive into the low 12s from high 13/low 14v

Is this normal?

I just had to replace the battery so I'm suddenly very observant of those fun little numbers flickering from my cigar lighter meter.

There's also zero, and I mean zero heat, but I need to replace the bonnet cable so I can get into the heater box to take a look. Waiting for part. 1999 Defender 90 S/W
Post #1077613 15th Oct 2025 7:02pm
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macfrank



Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 1137
Germany 2015 Defender 110 Puma 2.2 SW Keswick Green
Not sure about the Td5 but the Puma's blower takes about 8 amps on 2 and 13 on full. This could indeed cause a significant voltage drop. Without the engine running that is.

Heat or not is not related to the blower circuit.
Post #1077625 15th Oct 2025 8:35pm
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