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[Datsun 1200 encyclopedia]

B210 Tachometer

From Datsun 1200 Club

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Category: Datsun B210

Tachometer for Datsun B210.



Datsun B210 tachometer (24855-H5100)

Datsun 720 tachometer (24855-03W00) vs Datsun B210 tachometer


The plastic box that contains it is the opposite way around. i.e, a mirror image.

Right-Hand Drive
15705.jpgAlbum click to view

Left-Hand Drive

One-Wire vs Two-Wire

A one wire tach has ONE black/white wire not two (it also has the red wire and black wire that plug into the instrument circuit board ). I think all RHD 120Y wiring harnesses expect a two-wire tach.

Possibly you can adapt it either by soldering another black/white wire onto the tach (there is a spot), or just putting t-intersection in where the black/white wires connect on your wiring harness so that the tach is connected and the ignition circuit is still closed.

One-wire LHD
12134.jpgAlbum click to view

Two-wire? LHD

12133.jpgAlbum click to view


Wiring RHD

The tachometer is wired in series with the coil feed wire. There are two connectors that you pull apart behind the dash and connect the tach in the loop, plus it has an IGN+ wire.

RHD Wiring discussion
13528_4cc768929f4f8.jpgPost click for topic

Wiring LHD

The tachometer is wired to the coil negative terminal. All North America (and perhaps all LHD) B210s have the tachometer wiring right there in the dash. So no cutting needed, and no new wires need to be run out to the coil.

6-pin connector with BW, B, R, RW and RB wires. One pin not connected. 
1976-1978 with the 6-pin connector
BW Coil-
B Ground
BW coil-
B to terminal 'A' on dash
R to terminal 'C' on dash 

The signal wire is brought into the dash wiring even if it didn't come with a tachometer originally.

1974: signal is a single wire in the dash harness
1976: 6-pin connector in the dash harness
1976 CALIFORNIA: signal wire comes from the electronic ignition black
     box (which is under the dash)

7484013842_2fe9d680e5_m.jpg 7484011750_0a6072c4f1_m.jpg 7484010102_010584da15_m.jpg 7484008332_69fd5f595d_m.jpg

B210_tach_a.jpg B210_tach_b.jpg

Tach-Volt Meter

174_5d095bf4bd3b5.jpgPost click for topic

Part Numbers

TACHOMETER 1973-1975 
rectangle, 2-tab
  (op.) S-all (exc. 4-GX), Van
    24855-H5000 TACHOMETER
    24860-H5000 TACHO. VOLT METER
  S-all (exc. 4-GX), Van
    25007-H5000 MASK-tachometer
round, 2-tab
  24855-H5700 TACHOMETER GX
  24855-H5500 TACHOMETER (op.) K-DX, K-GL
  25007-H5500 MASK-tachometer K-DX 

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This page has been accessed 4,563 times. This page was last modified 21:51, 18 June 2019. Content is available under Datsun 1200 Club.