Sears Automotive Engine Analyzer
The shunt device should have a switch--a big knife switch right on the shunt. This is to bypass it for starting. Then it simply becomes an ammeter to monitor charging function
Here is a download for one model
https://c.searspartsdirect.com/mmh/lis_pdf/OWNM/1006467L.pdf
On the model shown below the "starter switch" is a larger shunt so the meter can also measure starter current. This is not true of all models, they vary. Some, the switch is a shorting switch for starting, and does not measure starter current. The ammeter on those is only for charging systems.
The shunt device should have a switch--a big knife switch right on the shunt. This is to bypass it for starting. Then it simply becomes an ammeter to monitor charging function
Here is a download for one model
https://c.searspartsdirect.com/mmh/lis_pdf/OWNM/1006467L.pdf
On the model shown below the "starter switch" is a larger shunt so the meter can also measure starter current. This is not true of all models, they vary. Some, the switch is a shorting switch for starting, and does not measure starter current. The ammeter on those is only for charging systems.
