Troubleshooting 14/3 wiring for 4 way switch

I recently renovated a house and had electrician change all the aluminium wiring and change the panel from 100 amps to 200 amps.
On this bi-level house for foyer we have a 4-way switch and is sharing the circuit breaker with my 1st floor. Now I don't know what happened but i started putting my recess lights after finishing the ceiling on first floor and installed chandelier in foyer but as soon as i turn on the breaker it trips. Need some tips on how would i trouble shoot. I was thinking may be take out all the recess lights and disconnect the chandelier and test one by one.
Is there a better way to troubleshoot what is causing the circuit breaker to trip. (Since its 14/3 wiring it has double gang circuit breaker)?
Thanks for all your help in advance

 

If the only thing you worked on was the lights and not the switches then your problem is in the lights. I would start by check each one for loose or pinched wires.
How many wires were there in each light. If more than two then a wring mistake could be the issue.

 

Hi Joed,
Thanks for your response. For recess lights the housing was already there so the only wire i connected is for chandelier wires. Unless one of the recess light housing has loose or pinched wire.
Thanks so much.

 

The housings were in place and you installed the insert ?
Your first post says install the recessed and your last post says just install the chandelier wiring.

If you didn't try just the lights before attaching the cable for the chandelier..... then the short could be anywhere...... from the lights down to the switches.