AfterMarketNews Auto Care Pro AutoCareCareerHub Auto-Video.com Brake&Frontend BodyShopBusiness Counterman EngineBuilder Fleet Equipment ImportCar Motorcycle & Powersports News Servicio Automotriz Shop Owner Tire Review Tech Shop Tomorrow's Tech Underhood Service Speedville

Home Technical Topics Tech Videos

Parasitic drains can be measured with ammeters with the battery cable. Now the problem with taking the battery cable off to install the ammeter is that, sometimes electronic modules are the source of the parasitic draw. In this technical tip clip instructor Dave Hobbs talks about some other tricks for diagnosing these problems. He talks about the class two message monitor– a feature available on the Tech Two and also the Master Tech– it basically tells which module’s active and which module is inactive. He also goes on to cover using a parasitic draw tool in order to not disrupt the circuit while using an ammeter. Watch this clip to learn how to use the class two message monitor and or a simple knife switch that can actually be used for some neat tricks in diagnosing some stubborn, hard to find, parasitic battery drains.

Similar articles
GM, Wally, ATSG
0 333

This Tech Tip is taken directly from Wally Mouradian’s course on GM Engine Performance by the Automotive Training Group...
Misfire, Bill Fulton, Tips
0 292

This Tech Tip is taken directly from an AVI Live Stream presented on August 6 2014 with Master Technician...
Service, Greg
0 223

Over the years, repair shops in general have gotten...
Idle Control, Ron Bilyeu
0 221

In this tip clip, Ron examines the constant idle control parameters. If you put a...

Take a Quick Quiz

GM, Quiz
0 299

This quick quiz is taken directly from Wally Mouradian's course on GM Engine Performance and is designed to focus...
Hybrid, Making Money, LBT 281
0 194

This Quick Quiz is taken directly from the course Making Money Servicing Hybrid Vehicles with Dave Hobbs. This is...