The following code snippet works:

    //pragma solidity ^0.5.0
    function checkSignature(bytes32 h, uint8 v, bytes32 r, bytes32 s) public pure returns (address signer) {
        bytes memory prefix = "\x19Ethereum Signed Message:\n32";    
        bytes32 prefixedHash = keccak256(abi.encodePacked(prefix,h));  
        signer = ecrecover(prefixedHash, v, r, s); 
    }

    //web3 1.0
    //multisig is my constract instance and second is an account address.
    
    const message = "SchoolBus";
    const h = web3.utils.soliditySha3(message);
    let signature = await web3.eth.sign(h, second);

    var r = signature.slice(0, 66);
    var s = "0x" + signature.slice(66, 130);
    var v = "0x" + signature.slice(130, 132);
    v = web3.utils.toDecimal(v);
    v = v + 27;
    
    const result = await multisig.checkSignature(h, v, r, s);

Note: web3.sha3 is a method from v0.2x. in v1.0 the function used is as described above. ecrecover gets the signer details from a piece of data, usually a hash and the signature obtained when the signer signed the data.

The following code snippet works:

    //pragma solidity ^0.5.0
    function checkSignature(bytes32 h, uint8 v, bytes32 r, bytes32 s) public pure returns (address signer) {
        bytes memory prefix = "\x19Ethereum Signed Message:\n32";    
        bytes32 prefixedHash = keccak256(abi.encodePacked(prefix,h));  
        signer = ecrecover(prefixedHash, v, r, s); 
    }

    //web3 1.0
    //multisig is my constract instance and second is an account address.
    
    const message = "SchoolBus";
    const h = web3.utils.soliditySha3(message);
    let signature = await web3.eth.sign(h, second);

    var r = signature.slice(0, 66);
    var s = "0x" + signature.slice(66, 130);
    var v = "0x" + signature.slice(130, 132);
    v = web3.utils.toDecimal(v);
    v = v + 27;
    
    const result = await multisig.checkSignature(h, v, r, s);
    //result === second

Note: web3.sha3 is a method from v0.2x. in v1.0 the function used is as described above. ecrecover gets the signer details from a piece of data, usually a hash and the signature obtained when the signer signed the data.