13-Pin-Towing-Socket-Tester-12V-VOSA-Approved-Sealey-TST22-p-MOT-Approved-for-use-in-testing-stations-on-vehicle-classes-4-5-&-7-Quick-&-simple-test-of-12V-13-pin-Euro-type-sockets-fitted-to-the-rear-of-the-vehicle-Supplied-with-4-9m-cable-to-enable-the-operator-to-use-the-tool-whilst-sitting-in-the-vehicle-Features-self-test-facility-to-ensure-the-serviceability-of-the-tool-Powered-by-12V-vehicle-supply-Also-tests-the-12V-continuous-ignition-live-feeds-&-the-reversing-lights-