Were is the horn in a proton savvy 2006

It uses a Vehicle Speed Sensor or VSS installed on the transmission close to the drive shafts. Check if the wire connector to the unit came loose or broken.

Google for Mitsubishi 4G1 series engine repair manual.

A faulty sensor, an intermittent misfire it needs to go on a scantool to see what the fault codes are, then it can be worked out what the fault is...

have a compression test done to eliminate head gasket or cracked head
check relay, fan fuses 2 at least, check wiring, check/replace coolant temp SENSOR unit have a pressure test done on the cooling system to check for leaks
replace the radiator ( blocked cores , missing fins )

Hi. Thanks for your question. For assistance on proton savvy 1.2 automatic 2006 model you can visit https://www.reliable-store.com and download the entire workshop manual which includes all the information along with the diagrams for better understanding. Good day!

Check battery charge. If OK. Connect scanner and register keys.

What year make and model is it then?

Either loose connector or faulty switch / relay

Check alt bat

If it is auto or AMT, use Renaultmatic brand. If manual, any good brand will do. Group SAE80.