Para magesi panji magesi ghanyake ghakuŵikika pa coil ya relay ya magesi, magesi agho ghakufuma mu coil ghakujumpha mu magnetic circuit iyo yili na chisulo, goliwoli, armature, na mphaka ya mphepo iyo yikugwira ntchito. Pakuti magnetic field yikukhwaskika, armature yikukopeka na nkhope ya mzati wa chisulo, ndipo ntheura yikukankhira vigaŵa ivyo vikujalika kuti vijulike ndipo vigaŵa ivyo vikujulika kuti vijalike. Para magesi panji magesi agho ghakujumpha mu koyilo ghali pasi pa mtengo unyake, nkhongono ya magesi yikuŵa yikuru kuluska nkhongono yakukopa ya magesi, armature yikuwelera ku umo yikaŵira pakwamba, vigaŵa ivyo vikujulika vikujulika, ndipo vigaŵa ivyo vikujalika vikujara.
Ntheura, relay ya galimoto yingawoneka nga ni msonkhano uwo uli na dera lakulongozgera ilo likugwira ntchito na coil na dera likuru ilo likugwira ntchito na makontakti. Mu dera lakulaŵilira la relay, mzere uchoko wakugwira ntchito ndiwo ulipo. Ici nchakuti nkhongono yakukhwaskana na switchi yakugwiliskira nchito njakucepa ndipo yingagwiliskirika nchito yayi kuti yilongozge mwaluŵiro katundu uyo wakukhumbikwira magesi ghanandi; boma lake pa / kuzima lingalongozgeka waka kwizira mu makontakthi ghakutumizga.
Relay ni switchi yakulongozgera ndiposo chinthu icho chikulaŵilirika (actuator). Kutora relay ya pampu ya mafuta nga nchiyelezgero, ndiyo switchi yakulongozgera pampu ya mafuta, kweni coil ya relay ya pampu ya mafuta yingapanga waka dera kwizira mu malo ghakukhazikika pasi gha chigaŵa cha magesi (ECU) para transistor yakuyendeska mu ECU yazgoka.
