Mend Security Systems, Home Alarm Systems

Security Systems, Home Alarm Systems
Find out how to mend it for free.

Ask Question

Related Categories

Mend Car Alarm Systems
Car Alarm Systems

Home Alarm Systems

Mend Mend Security Systems, Home Alarm Systems

Scantronic 9751 Aux DC Fail keep blowing fuses?

Have replaced fuse twice. Blows straightaway when system reset.
How can I identify what is causing the problem

July 2019
Disconnect cables at aux + and - terminals. If system resets without fuse blowing then there must be a short circuit between one of the cores. If you have a test meter check for continuity between each pair of cores in each cable. There should be no continuity if there is then that is the faulty cable/ sensor or whatever is on that zone. If no meter reconnect each cable in turn until fuse blows, faulty cable found. Much easier with a meter though!

alan mckenzie
July 2019


Find out how to mend just about anything for free repair help, information and advice.

Can you help?

Are you an expert who can help answer questions? Click here to see the unanswered questions for each category.