Indicators flashing fast & dim

[ShaunC]

Hi guys. I hope someone can help. My wife's youngest son has a CRV 2005 2.0l petrol. When wiring a 7 pin trailer plug up he got indicators & tail light mixed up. He corrected his mistake but ever since his car indicators are flashing fast & very dim. All bulbs are the correct wattage and all ok, earth's are fine as well. He has changed the indicator relay as well. We are stumped. Any ideas as to what is wrong would be much appreciated. Ps. Hazards all work fine. Tia. Shaun.